I just ordered one, I'll let you know how it sounds with my DT 880 soon, but it's getting positive reports with the dt 880 :3 and BUY AMERICAN, screw supporting those Chinnese OEMS and companies! AMERICA ftw, that and honestly... I'm sure LD isn't as bad, but those Bravo, Indeed, and other off name Chinnese hybrids in the $100 price range have a rather poor build quality. For $137 u get an American made Hybrid Tube with like a 3 year warrenty, and a very fast turn around! Anything from china and IF it breaks.... going to be weeks before u get it back with the transit [HYPE TRAIN CHUGA CHUGA CHUGA CHUGA WOOOT WOOOOOOT]
Still though, feel free to wait a week for my impressions. I expect it to drive my 600 ohm dt 880 nicely, should drive a 250 ohm just as nice if not better!
I have also been looking at the Vali. I am definitely interested in your impressions, and I can definitely wait a while before ordering an amp.