After a few months with these, I have a bit of a love/hate relationship..
The detail is still phenomenal, and I like the mids and highs - as KraftD1 above mentions they are brilliant for Jazz and instrument presentation in general.
Listening to Cinematic Orchestra at the moment and it is bliss to my ears!
I must say though that paying about $530 Aussie dollars, plus above $40 for the gel pads they were pretty pricey.
Seeing these deals for $370 now is annoying!
Anyway, they definitely don't have 'no bass'; but they definitely don't emphasise bass in any way compared to the other frequencies. I should've guessed this by looking at the FR graphs.. but I wasn't to know what it'd actually sound like til I got them and I had what I thought was some good advice on other forums etc..
The bass the T70s produce is suburb in quality (tracks with low sub really give a nice warm fuzzy feeling, especially since I got the gel pads).
The quantity really just isn't there though. In order to get what I personally feel like is 'my amount' of bass level I have to turn the overall volume up too high, making the highs quite piercing and not fun for my ears...
This is all just my personal preference though. A dedicated head-amp might help; at the moment I'm still just going straight out of my Roland firewire soundcard. I believe its a good source but it probably won't do many cans justice in terms of amping.
So anyway, for my bass needs I just ordered a 2nd hand pair of Pro-900s (so pre-burnt in) that already have some Denon pleather pads modded for them too. Can't wait to hear them for myself and find out what all the fuss about their bass is! I was weighing up Denon D5000 but due to the much higher cost I'd have to sell the T70s.
If the Pro900s float my boat though and are good for gaming too as everyone says with their S-Logic, I might keep the T70s as a different style of cans (contrasting/complimentary). Perhaps as my monitoring/mixing cans for when I make music / do sound design. Or I've been thinking of selling and going for some much cheaper DT-250s, which are meant to be as close to flat response studio monitor speakers as you can get.
I'm probably going to get a Matrix M-stage before I decide whether to keep the T70 or not though.