Look like a couple of nice rigs, there!
I'm in the process of planning my next upgrade. I'm still using DDR1 on socket 939 because I've had a whole load of DIY to spend my disposable income on, so the next rig will be i7-based, too. I did manage to get my hands on an Intel X25-M solid state hard disk (80Gig version), which I'm currently using. I have to say, it's incredible!! The difference it makes to game loading times is phenomenal, even/especially in a old system like mine. Everything in windows feels very snappy indeed. They do cost a lot (although the new 34nm version costs a fraction, so these are rapidly becoming very viable). If you can possible stretch to it, that is the one upgrade I would absolutely recommend to anyone. Do beware of other manufacturers' disks, though. The new Intel SSDs are blindingly good, and don't have some of the issues that "budget" SSDs have once they're full (the OCZ Vertex range is a suitable alternative, although the new pricing structure makes these not worthwhile, now - at least until the new OCZ prices come into effect).
Whoa, that was only going to be a short response!
Roo