BREAKING NEWS: My "slammin' setup" from 2 years ago has finally burned out the chipset fan on the motherboard. I gotta say, I've been extremely pleased with it since I bought it. Now, unexpectedly, it's time for an upgrade. Really, all I need is a new fan for the old motherboard, but a new motherboard and CPU wouldn't hurt.

Since I've been out of the hardware scene for a while, I'll open up discussion on what's hot now. Remember, I'm not a fan of "bleeding edge", I'm looking for best bang for the buck.

Update: Ok, so I didn't go the performance route, but I think I got a modest computer setup. Maintaining about the same performance before the motherboard went out. I found a deal on a dual-core AMD Athlon X2 Brisbane for $30 shipped, so I decided to bump up the CPU a tad. I went cheap on the motherboard because, frankly, I don't need a whole lot. I settled on the Asus M2N-MX. Because my old RAM wouldn't work on new boards, I got 2Gb of OCZ DDR1066. The machine is functioning again, all systems are go and I'm back online at my regularly scheduled times. Thanks for all of the suggestions. I'll prob be ready to upgrade this "value" setup in a year or so.
(total spent: ~$130)