Currently have a HTR-5660 with 6.1 discreet surround (DTS:ES). It sounds sweet already, but I can't wait till I get out of the apartment into a house where I can properly test it out.
For what you're looking for I would suggest the [link|http://www.yamaha.com/yec/products/receivers/RXV550.htm#| RX-V550 ] 6.1 surround receiver priced at $399 MSRP or the [link|http://www.yamaha.com/yec/products/receivers/RXV650.htm#| RX-V650 ] at $499 if you want 7.1 surround.