I recently purchased a B&K 200.2 reference 2-channel amp on E-Bay. These go new for about $1500. I paid $760 and the unit is like brand new. It works very well with the Polks. It is last years model, but the manufacturer confirmed that the only differences are in styling. Here's the deal, the same guy has a pair of B&K 200.1 mono blocks in perfect condition. He originally paid about $2500 for the pair (demos). They go for about $1500 each new. He told me that he would take $1500 for the pair. If I wasn't married, I would probably splurge. If anyone is interested, let me know. He is now out of the country but is planning on listing them in E-Bay when he returns. These are very sweet units.