Amp for my B&W CM1's

Hi all,

I plan on just using the B&W CM1 bookshelves as my speakers and so am looking just for a stereo amp to play my music. The three primary amps I have been considering are:

1.Pioneer Elite SX-A9
2.Outlaw RR2150
3.HK 3485

I have a preference for the Pioneer and Outlaw since they both accept USB inputs and I'll be using my iMac as my main source for music so I can just connect my iMac directly to the amps. Of the 3, I've only heard the Pioneer and B&W CM1's paired together, and it sounded really good to me. Does anyone know if the Outlaw or HK would match up well with B&W speakers? Does anyone have any suggestions for other amps? I've heard that Rotel's match up well with B&W, but I don't really know anything about them. I really liked the Pioneer, but again, it's also the most expensive on my list, so I am a little hesitant. Any sort of comments are appreciated.