6 months after comments :
Thermaltake case – I wouldn't get another. The feet fall off if you try to slide the case along the ground.
SSD – is an essential item, it increases smoothness no end.
Bluray drive – don't bother. Copyprotect paranoia means you can't take screenshots and I doubt bluray data will become a big thing for PCs.
It's been 99% stable, with only a couple of "grr-crash" dropouts. Battlefield 3 wouldn't run but that's either overclocked graphics or incompatibility with sound. If just one game has stability problems, I'm included to blame bad software.
I haven't overclocked the machine but with max temps of 52degrees C for cpu on load in the summer and 62degrees C for the graphics, I reckon it could go past 4GHz easy. But as I don't intend to burn the machine out any time soon … Overclocking is not something I'm going to do.