Amp recommendations for Acoustic Research AR 90's

I recently purchased some AR 90's, and I'm looking for a decent used, cost effective (budget is around 800.) 2 channel SS amplifier to push them. (Mono pair also on the table.)
They're pretty power hungry. (2x10" in parallel, an 8" and 2 tweeters.) They're 4 ohm speakers, that run down to 3.2 and I've heard that they need at least 200 wpc to start sounding right.
Any suggestions would be appreciated.
Are you ready to buy or just looking for suggestions?
Pretty much ready to buy. My local Hi Fi shop has a used Harmon Kardon HK Signature 1.5 that I'm leaning towards right now, but I'm not committed to anything.