I've auditioned several in your price range. Ended up with the Plinius 8100. You can probably find a good deal now that the 9x00 line is out.
Might want to add the Simaudio i-3 to your list. It's about a thou used and is a solid product.
Are there any features you're particularly interested in? Phono, HT bypass, etc could make your decision easier.