Excellent amp. The first 40 watts are pure Class A, so you need to make sure you have a lot of room for it to breathe. Some say it does not have the greatest woofer control, but that has not been my experience. Of course YMMV
the .5 revision is a noticable improvement over the original series. Both are excellent though. Not sure where you got your information from?
well, yes and no. The 350.5 and the monoblocks certainly improved in the .5 series. The odd duckling seems to be the 250, where the 250 is still a bit more musical and accurate than the 250.5 for some reason for most of us who've tried them. go figure.