Need help choosing a power amp


Hey fellow A'goners,
Well, I have another selection question for all of you. I am going to upgrade my power amp and need some guidance. My current system is an Adcom GFA-555 mkII amp, Adcom GFP-750 preamp, and I will be picking up the Revel Concerta M12 speakers. I've been trying to find something that will mesh well with this set-up, but have been just overwhelmed with the choices. I'm thinking I'll probably pick something up used (so pretyy much off Audiogon), in the sub $1000 range. Any ideas? Oh also, I would like to stick with solid state rather than tubes.
Thanks!
autre
Wow! Thanks for all the responses! I certainly do have a lot of choices to ponder now. Please keep the ideas coming. In answer to Rich, I am pretty satisfied with my pre-amp; it was a big upgrade in sound than the GTP-500 II that preceeded it. In fact, that improvement has now given me the upgrade bug for the amp. Also, thanks so much for the reference for the M12 review, I've been searching for one!

On another note, I know I said I wanted to stick to solid-state, but I got offered a Audio Research D-76 recently, and I wondered what the thoughts are on that amp, since I can find precious little online.

Thanks!
The D-76 is a tube amp like you mentioned. On audioreview.com it received 4.57 out of 5 reviews and is apparent this amp is well loved by the reviewers.
TAD-60 if you are considering tubes. Check out the reviews. Less than 41000 for 60 watts/ channel tube..