If you decide to overhaul the tower part, I'm quite sure Skwoowy is still looking to buy such a config. I had pretty much the same but sold it to my dad.
Now I have an athlon64 3000+, an asus a8n-e mb, a geforce 6600 256MB pci-e and a new tower and kept the rest (ram, hds, cd/dvd drives and screen)