Clint - great to hear its working fine :) Have you looked at the Parasound Zamp? bit more power than the T-amp. Paul, I don't know how efficient the Lsi7s are, but the T-amp is 15W per channel into 4Ohms.
Clint, it isn't perfect ;) for one, it was only meant to take in 1 source, and thats analog. Second it runs on batteries although you can get a adapter. The volume control also isnt the best. BUT having said all that its a good/cheap tryout for digital amps. If you want to use digital...