Classe Audio CA-101 - 100w/ch, great build quality, available used for about $1,500
Levinson - any of a number of older models, like the ML-9 or No. 27, with very conservative power ratings, great build quality, in the $1,500 to $2,000 range,
+1 on Luxman, but from my experience those with lower power ratings are not suitable for inefficient speakers. If all you need is 25+ w/ch, you'll be fine