Hello all. Having two jobs has allowed me to have a large amount of extra cash. So I want to upgrade my pc. Sadly, on my 1.5 year old computer I can't do much because of my Motherboard. I have only one PCIx16 slot that's being used by a ATI HD 5870. I have two extra monitors I am unable to use because I have run out of ports.
Further more, I have run out of other PCI slots.

So some questions, how would I go about doing this? Will I need to buy W7 again? On the CPU end I have an i7 920 right now.