My PC died a few days ago - windows would no longer boot. It was the 4th time I've had to reinstall windows in a year. I later deduced it was likely the hard drive all along - its a Western Digital 150GB (unsure of the exact model at this time). I am fed up with this POS!
Anyway, my point is - I bought a new PC! Its a core i7 (2.65Ghz), with 3GB RAM, Windows Vista 64 Bit, nearly loaded! Amazingly, it was only $1250 US at Best Buy. So others may want to look into doing this as well. Compared to my Quad Core 2.4 GHz, it renders images 30% faster, if not 50% faster (at least from the benchmark test). Its also super silent and super stable. Despite it having Vista, its definitely worth it.