I have owned a few Technics amps, all older, and just bought a DA-10. I paid $400 can. for it at my dealer, which is awsome since London Drugs, and other places were selling it for $600+ so I couldn't be happier about the price I got. As for performance, I am very happy with it, other than the fact that it runs hot when the fan hasn't kicked in. I'm trying to find a way of rewiring the fan so that it is on whenever the amp is on, but not too sure about how to do it.
If you can get Technics for a good price, go for it, you won't be dissapointed.