Interesting you think the case is too small. I saw the case Youtube demo'd on Corsair's site. The thing's huge, and has built-in soundproofing which is a plus when I play movies. I chose the power supply just because that was what was used in the demo and is supposed to be very quiet. Considering that I only plan on using one video card that probably is overkill. My primary concern about video cards is that because my TV is only 1080p will I still benefit from a better card playing games as well as TV and streaming? I want to have as much of all worlds as possible. I can wait. Haswell? I haven't bought everything yet. This stuff get's confusing. I thought X79 was a step up from Z77 and the Core i7 chip I was looking at more or less future proof socket-wise. I got a headache now.
Having a better look at the case, it might be good. But you probably may want to get better fans and make sure there's good filtering on the intakes. As for the "soundproofing", I don't know if sound dampening foam works as people think it should. It only dampens sound that resonates in the case. Exhaust fans are not affected, and this is what you usually hear out of a case.
There's no benefit to upgrading the video card. The baseline resolution these days is 1080p and even the GTX 660 Ti and Radeon HD 7870 GHz Edition can handle most games at this resolution and provide buttery smooth framerates. The you'd only get a benefit if you were driving a higher monitor.
The problem with the X79 is that it's more expensive and you don't get much more performance out of it unless you buy a Core i7-3990X as opposed to a Core i7-3770K with a Z77 board. Sure, there's an Ivy-Bridge E based chip coming out, but it's probably going to cost $1000. And besides that for games, you get a rapidly diminishing on returns once you go past the Core i5-3570K. The Core i7-3770K doesn't perform much better, same with the 3990X, and you're spending almost 5x at that point. As for streaming media, if it's just streaming and not re-encoding (like PS3 Media Server), then a dinky Celeron can do the job. If it's re-encoding you could use a beefier processor, but the i5 is more than capable of handling that task.
Haswell is Intel's next generation CPU.