Modwright's KWA-150 SE is a good value option for a power amp. It is solid state, but sounds tube-like and on the warm side. It has excellent resolution and inner details, hence it is very enjoyable listening at low volume levels as well as high. Build quality is excellent. The amp has a switch for 'bridged mono' mode if you ever add a second amp, and re-sale value is solid with modwright gear. Msrp is circa $9k, but you can pick up mint 2nd hand examples up for around $5500. It is an underrated amp imho.