>implying you can rename Program Files
>implying I have 663 GB of apps
It's actually pr0n, SceneHD's weekly packs (so many files due to them being split in a lot of tiny RAR archives). Average is 49.37 MB per file (663*1024/13751) is pretty normal for scene-style releases.
You ain't getting a 5.1 for 80E, not even for double of that.
Microlab Solo 6C would be a good option for you.
Also, just set sound to 7.1 in games, leaving it as 2.0 in Windows. Providing your sound card is any decent (X-Fi HD / X-Fi Titanium HD / Essence ST / Essence STX / other things like that) it'll sound awesome.
You do realize that neither XClio, Corsair, OCZ or anyone else makes power supplies themselves, so quality doesn't depends on budget-ness of them?
You obviously have never read any JG's review. He tests basically everything - including ripple, voltage regulation, efficiency, power factor etc.