I will get the chance to audition these three at my local shop in the next week where the T1 and LCD2 are priced $1000 and the HD800 $1200.
I will be listening 90% of the time through an iphone (320mp3) and ALO RX mkII and 10% of the time through a Cyrus CD/ Amp output to the ALO (the Cyrus has no headphone socket).
I listen primarily to electronic music with some ambient, classical and rock thrown in and am looking for a meatier upgrade to my pair of 325is. I will likely keep the Grados, so a complimentary pair would be cool.
My question is, do I just go for the pair which sounds best in the shop or should I take into account that I may in the future buy a full sized amp to attach to the Cyrus system and take into account that the Senns may scale up better?
This will likely be my last purchase for a while so I'm looking for a good all-rounder.
I own the HD800 and LCD-2 rev.2. I've just sold my dedicated amp (Lyr) to make way for something better and I've been listening to the HD800 for the last week straight from my MacBook Pro's headphone jack. The drop in refinement and authority when doing away with a dedicated amp and dac is certainly noticeable, but that hasn't stopped me from enjoying the music. I haven't heard the RX but I suspect it would present music better than how I've heard it the past week and if that's the case you should still get a good glimpse of what this headphone is capable of. If you plan on upgrading your chain later, don't be deterred by posts proclaiming how woeful the HD800 is without an uber rig.
I'm listening to the rev.2 at the moment (again straight from the MBP) and the drop in sound quality is less stark. This would be a wiser choice if you have no intention of pouring more into your rig.