Why debate on whether to get T1 or HD800.. or others?
It's not hard to get one for a good condition off the classifieds here. If you don't like it, you can sell it and not really lose much (if any).
But, like I said earlier...from personal experience, the T1s with serial #s after around # 4000 have less spikey treble. I have tried both. The new one is not fatiguing at all, and the sound is just excellent, very very balanced.