Fitting SLI + sound card + RevoDrive

[Really]

This is all pretty much speculation to get me through the day but let's assume I actually have this much money... :P

I'm planning on upgrading to IB, a RevoDrive, and a non-reference GTX 680 pretty soon, with the possibility of SLIing two 680's later on. Reasons being: a) I have a shiny new 120Hz monitor and want to run PS2/Guild Wars 2 at 120fps, and b) I'll be doing quite a bit of video recording at 1080p (also hopefully at 120Hz, for awesome slow-mo shots!), which also explains the RevoDrive (huge write speeds needed, and... I like quick things).

My problem is that I already have a PCI-e sound card that I'm pretty set on keeping, and I can't see how I'm going to fit all of this in if I do get a second 680. The non-reference ones (e.g. this one are all looking like they'll be 2.5 slot so even if I get a motherboard with 3 PCI-e slots (like this) I still can't see how it'd all fit. For example, I could put the sound card in the PCI-e x1 slot nearest the CPU, then the two 680's, but there'd still be no room for the RevoDrive.

I've read somewhere about using risers but have no idea what I'd do with the card once it was "risen". Anyone got any ideas to my semi-issue? :P