I happen to be a fan of B&K amps. I think the older amps as well as the newer ones are great, especially at their price points. Warmish/neutral sound with plenty of current to drive most speakers very well. I don't think you can go wrong with any of these. (No affiliation)
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1289951786&/B-K-Reference-200.5-B-K-Refere
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1288647086&/B-K-Components-Reference-7250-
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1289414649&/B-K-Components-ST-125.3-3-chan
Bill
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1289951786&/B-K-Reference-200.5-B-K-Refere
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1288647086&/B-K-Components-Reference-7250-
http://www.audiogon.com/cgi-bin/cls.pl?ampsmult&1289414649&/B-K-Components-ST-125.3-3-chan
Bill