Ok, been thinking and researching and stuff for most of the day today, and I think I'm gonna do the full new system sometime in the next few days to week. I think we're currently in a pretty good time for value, overclockability, and stability/maturity of products to build a high-end system that will go 2+ years without touching. Here's the revised spec I'm looking at after considering all the comments earlier in the thread...
Asus A8R32-MVP Deluxe Link
AMD Opteron 165 Dual-Core Processor Link
Mushkin XP4000 Xtreme Performance Black Series Link
2x Seagate 500GB Barracuda 7200.9 Link
ATI Radeon X1900 XTX 512MB Link
Zalman CNPS7700-Cu Link
Thermaltake VA8000BWS Link
OCZ 520W ModStream Power Supply Link
Which is sitting at just over $3000 Can w/ tax. There is the potential for the X1900 to change between the XT and XTX, and the CPU to change between the 165 and the 170 - all 4 of those components tend to go in and out of stock and I'll likely end up with whatever they have when I drive down there - so I priced out one expensive one and one cheap one. I'll just keep my LG optical drives from my current system.
I've backed off a lot on the bling for what I think will be more functional, and should still keep a fairly cool look - pretty much everything in there is black, the few things that have lights are mostly blue, and I have a decent selection of blue LED's and cathodes around from previous projects that I can toss in too. So black and blue is the theme now.
So now the question comes down to this specific build. Any problems? Anything I missed? I've already incorporated most of the suggestions in this thread, so the build should be pretty stable at this point.