Piano forte gold is £2300 I heard.
That depends - if you've spent all your budget buying one then yes! I think you could buy my whole collection for the price of a new Tera...
I agree that the Piano Fortes are not worth it no matter how great they sound, IEMs are for portable use and they lack isolation. That said, if one appears used for a good price in the FS section somewhere in Europe I might give it a try
If you want open headphones than anything over $40 (cost of Koss Porta Pro's) is too expensive for Tera (hard to believe but this is actually true based on the pairings I have tried so far).
However if we are discussing IEM's than you really have to go over $1k to get optimum pairings (the most recommended based on Tear head-fi threads seem to be SE5 or 1plus2 - I'm waiting for 1plus2 to get delivered and can't wait to hear if it actually approaches the Porta Pro's - funny how I'm hoping that my $1500 purchase can approach $40 purchase - but if you really need to use IEM's and want the best pairing there seems to be no other choice - I have RE-600 and while good compared to other IEM's I have tried they are not even close to Porta Pro's in my opinion).
Any recommendations for good isolation cans for commuting with TP. On ear and Over. I find HD25-1 ii excellent sounding, but uncomfortable with glasses - and effectively not practical.
For over ear I have Beyer DT770 (80 ohm), and for on ear I have Beyer DT1350 and KEF M500. All sound great with Tera with KEF's being most comfortable (glasses should not be a problem), but with least isolation.
But if you really want isolation when commuting I think you need IEM or cIEM. If you decide to look into that I can recommend Hifiman RE-600 which sound great (but have very bad cable that feels like it may not last long), and Klipsch x10 (relatively cheap but very good SQ, isolation, and extremely comfortable). I am also about to receive very expensive Traslucent 1plus2 which I hope will be significant improvement over my current go-to IEM which is RE-600.
Yuin PK1 is excellent but in terms of SQ still cannot compare with Korta (but I don't know anything else that can either in terms of paring with Tera).
However I think PK1 holds it's own against most good IEM's so if you don't need great isolation go for it (the only reason I even use RE-600 over PK1 is isolation which I need just about every time when I can't use Korta - I don't think PK1 gives up much if anything to RE-600 in SQ). For use in office environment (where you can't have total isolation) I think PK1 would be perfect (and I find PK1 extremely comfortable to wear over longer periods).
German maestro 8.35 & DT770 both look good to audition, and useful ear muffs too. I've tried DT1350 in shop a couple of times and never found a comfort position to hear the bass. The pads on HD25-1 ii being bigger enough to not have to worry about. IEM's / isolation with TP is a conundrum. I've got the Kipsch x10, and no where near the sweet spot such as HD25, therefore hard to persevere with. But not bad for a quick dash to supermarket. Look forward to your feedback with 1+1, all indications are great match with TP. Do wonder about isolation though.
Unfortunately I can't answer any of those questions (I don't like rap and pop) and I actually like the cables on PK1 as is (at least from ergonomic perspective they are much better than for example RE-600).
Even though I told you I don't like rap or pop I should point out that PK1 are 150 ohm (so you will probably want to run Tera at high if not highest volume to get the bass output you want - especially outside and for rap/pop music). Therefore Tera as is may or may not have enough output with those types of phones depending on how loud you like it. I do know that I sometimes wish Tera could be louder (when I listen to music with distorted guitars - for example Hendrix, Zeppelin, Neil Young & Crazy Horse - with this type of music regardless of headphones I usually wish Tera could be louder). As a matter of fact I just purchased Meier's Quickstep amp to address this (and that works perfectly without at all coloring the beautiful Tera sound).
Then I should look and try to find a cheeper PK1 new for my Tera and my exercises.
My only question is: Why is the PK1 so expensive for a earbud? What is the driver made of? And also is the cable copper with jack plated plug?
Supposedly so, but who has actually tried many "budget" models? I've seen lots of expensive customs with low impedance BAs and multiple crossovers written off as bad pairings in this thread, but not many reasonably priced universals...
If you don't mind a little hiss (not enough to hear outside on a quiet street during the daytime) I think the Heir Tzar 90 are a great match, as long as you listen to reasonably well mastered music. I'd love someone with some of the crazy expensive (to me) recommended models to try them - $260 is pocket money to you guys, right? Sadly with quite a lot of the modern rock/metal I listen to I found myself wanting more bass due to bad mastering, but if I had different taste in music I would have stopped looking for an upgrade and been happy with this combo - I nearly did anyway. But I stumbled on some cheap HA-FXZ200 and having done a little research (no crossovers, dynamic drivers) I couldn't pass them up and they too have not disappointed in terms of sound.
I'm not saying the really expensive models don't sound great, but there are probably many lower priced options that pair very well and have simply not been tried due to the scarcity of Teras in the world and the deep pockets of most of their owners.