Using Prospect HD, and loving it. It came bundled with with PPro 1.5 ( Dual Opeteron and 2TB Raid Array). Here's the question, is there any reason to upgrade my Window's Media Player codec to the newer versions--like Ten? Would it improve RT playback?

the only reason to upgrade to ww player 11 is because this version install the latest codec wvc1, the latest wmv9 codec with specs for HD-DVD.

I've upgraded to 11, and use AspectHD. No problems with CFHD playback but no improvements that I noticed either.