Corsair VX550 (unless it's loud?)
Can't really speak for the suggestion about a case that'll meet your needs or a CPU cooler for the i5 (though I'd expect you could check out the Recommended Heatsinks
as a start to see what general recommended coolers are (SPCR standard test system is LGA775, but I would expect the general results to carry over and be useful)).
As for the VX550, the VX450
review was positive, and both the VX450 and TX650 are recommended PSUs, so the VX550 should
be just as good as either of the others (unless it's an odd model that's not a Seasonic-built or something, in which case it'd be harder to say).