As mthomas47 says, there are a number of options available that will up mix stereo (2.0) to surround (5.1).
The setting that worked best for me was DTS cinema mode. I disabled the back surrounds so that only the front three speakers (LCR) were producing the sound stage. I then adjusted the center channel width to focus dialogue more. There is also the option to increase center channel dialogue level too - but left it alone.
All the above is a few taps on the web interface and easy to do.
Marantz SR-7009, Oppo BPD-93, MTV 7000D, aTV, Harmony Home Control remote, KEF E301+T101, MiniDSP (2x4)+(10x10HD)+(DDRC-88A), Emotiva 2xXPA-5 (Gen2), Rythmik 2xF12G+2xF8, HiMedia Q16, LG 55EC9300.