I was a huge WD Velocoraptor fan. But the new SSD's gobble the raptors for breakfast. Just get a cheapie HDD to hold your music and stuff, and a 128GB or larger SSD for Windows and your games and you will be optimized.
No, I doubt you'll hear much with the case closed and the cpu/gpu fans.
I'm with babernet, I love the Raptors, bought every one from 74GB to the 300GB, (along with tons of normal drives) but I skipped the latest for a PCI-E SSD for boot, and when my scatch disk died I replaced it with a SSD.