Sorry, I don't have time to read the entire thread, but i'll shoot anyway.
I'd go back to AMD 64 S939, or wait until a 3500+ is more reasonably priced.
The new sockets have double the memory controllers (like the FX series have) and perform quite a bit better than the S754s, especially in multitasking and applications.
As for the HDD, wait a bit and pick up a 200-400 GB SATA HDD with 16 MB cache and NCQ tech. I'm not sure if these work with the standard SATA 150 port, so you may have to look that up.
Here's one that's available now. Supposedly they perform on par with 74 GB Raptors (which are faster than the 36 GB one you plan on getting). But it actually has decent capacity:
http://www.newegg.com/app/ViewProductDesc.asp?description=22-144-359&depa=0