I'm leaning towards Vista Business 64-bit as my OS, simply because I'm fairly confident that things will work just fine for now. I've still got a few jitters moving away from XP Pro, so I'm going to just have to work past them!!
The Quad Core that I really want is the Q9450, but it's roughly twice the price of the E8400 Dual-Core and I'm not so sure the performance boost will be there right now, and might even be worse in certain applications.
I'll post updates when I get everything finalized, but it looks like Dual Core will be my choice and again, I really appreciate all of the advice!!
-------------------- "Computers help us solve the many mysteries of the universe. They also help us make the same mistake many times, really fast."