Well, what's your budget?
I'd definitely go used from AudiogoN. Here are some examples:
Adcom for $400.
Cary for $850.
Old-school
Bryston for $300.
PS Audio for $550.
Going up in price a bit:
Classe for $1,100.
Krell for $900.
I personally have Sunfire Cinema Grand that I like very much. There's a similar 2-channel model
here, but I think it's a little high at $1k -- you might be able to get it for less.
Another amp I have that I like a lot is the Audio Alchemy OM-150. I bought that amp used almost 10 years ago, and it was my first foray into separates. I still have it, and am glad I do. A very nice amp if you can find one.
Good luck!