I've been slowly becoming more and more picky about audio quality the past few years, and my speaker setup just isn't cutting it anymore. I've been generally sticking with headphones (the Sony 'DJ-style' headset, and two sets of Sennheisers, depending on where I am and what I'm doing), but would like to branch into a speaker setup. I somewhat recently purchased a Revolution 7.1, and aside from the complete lack of drivers for FreeBSD (and contacting support hasn't done much), have been quite impressed. I'd like to finish off the setup, and trash my $80 Koss speakers.
So. Having done a quick bit of research and seeing a very small handful of opinions stating both, would it be better to stick with a good set of powered computer speakers, or pick up a low-end receiver and branch out from there? I'm looking purely for audio quality, no other considerations (although the budget will be roughly similar for both). I was looking at either the Logitech Z-680 or Z-5300 as options, but would not be averse to picking up some true audio equipment.
Any comments or suggestions? Any recommendations on computer speakers, if you feel so inclined?