I've seen many feedback that Tube amps are the way to go with the T1s.
I was running the T1 off my xonar stx for awhile, it drove them fine but was too harsh? For my liking. I Couldn't tolerate the higher pitch violins/vocals/guitar at louder volumes so the knob is generally around 20-30% depending on the music.
With the WA2 I can tolerate up to 50%, is less harsh, more refined and has this 'filling' in it.
I don't know, I'm new too but took me weeks to decide between 10 different amps .
I've considered the A1 at the start too but decided to try the tube amps at the very least with the positive feedbacks out there.
Take your time and read as much as you can, there are heaps of review out there