I fgured out one of my DVD's has a THX optimizer.. would that make it any better or does that only make it better for DVD's? :/
Sounds like this will be only for DVD.
Get for example a Denon 1311 (it was overkill for my PC, but relatively cheap), get some speakers and a subwoofer, and you'll ask yourself why you didn't do this years ago (at least i did).

The only problem is that you might get addicted to good sound. Right now i'm scraping money together as the new speakers will cost me ~1500-2000€ (i might need some time for that, but good 5.1 is worth every cent you put into the system)...
