1) Don't bump.
2) All looks good to me.
3) From the Expansion Slots section on the Newegg page: "single at x16 or dual at x8/x8 mode"
4) From the Features section on the Newegg page: "Supports NVIDIA Quad SLI and SLI"
I didn't see a hard drive in your list, so assuming you already have one, I'd say you're good to go.