Ah ha! That is because you are listening the exact same audio track as the DVD. It does sound different in TrueHD, though, and much better for that matter - but you can't really tell.
Maybe you really do need a 4310...
By the way, I really like it, but you are certainly entitled to your opinion. Don't blame the Blu-Ray though. Blame the Pioneer VSX-1015TX, or the lack of 7.1 analog outputs on the BD60...