I decided the last cap ex I'd work in for the year was more RAM for the new iMac, to boost it up to 8 gigs. Holy. Crap. I can run Windows 7 in Parallels like it's native, throwing 4 gigs at it. Everything runs super fast, and I can concurrently load up stuff on the OS X side without consequence.
It's kind of amazing to think about the computing power we have available in this day and age, and how (relatively) inexpensive it is. Exciting times for people in my line of work!