I've owned many integrateds and high-end seperates. Presently I'm using a Cayin A-88T and must say the amp is amazing. The stock tubes aren't bad, the thing is built like a tank, renders bass wonderfully, and is very transparent without excessive tube bloom. I'm feeding it with my Exemplar 2900 player, and it's driving my Gallo 3.1's.
VERY Impressive Amp. You may want to give it a listen sometime.
If you decide to buy one, feel free to email me and I'll share some hard-learned tips on wringing the best from the unit :)