Thanks, qubit. I already have a X-fi card installed. The receiver also has a DAC built-in, as most do nowadays. I cannot stress enough just how great this sounds in near-field. I'm planning on upgrading the sub to a SVS or Hsu brand 10", perhaps running both, though I have an idea that the Polk Audio may get its butt handed to it from either one of those other subs. I still am very pleased with the Polk's sound, at $150. I didn't mention it in the OP, but I tried the Klipsch Pro-media 2.1 system, and I have a friend that gave me his Klipsch 4.1 system since the speakers are the same. While it was an upgrade from teh Logitech cheapos, it left me wanting. The satellites sounded great, but the bass, even after replacing both 6.5" woofers, was muddy and weak for music, and underwhelming for gaming. I'm also now looking to replacing the receiver with a good 2 channel amp/pre-amp, and giving the receiver to the grandkids along with some bookshelf speakers I have laying around. Too many multi-channel options makes it difficult for me to bypass them, and the manual is less than helpful in that regard. It seems they just assume that the user is familiar with all the various means of multi-channel outputs, and other sound altering stuff. I just want a good amp that runs 2 channel sound, with none of the extras that I'd never use.