Yes, but it could be a rather long wait. :P
I would also stay away from SLI, I mean sure, you could afford it if you really wanted to, but I am certain you wouldn't be able to tell the difference between an SLI setup or a single high end card like a 6800 Ultra or x850XT.
Also, if you only buy one card now, you'll have money left over to dish out on a new, next generation card that's due out in a little more than a month. I'm quite certain that two 6800GT's in SLI would crumble to their knees when we see these new 24 pipeline, 512bit cards.
A really good investment in my opinion would be a phase change kit of some sort, you would have to sacrifice a few of your components, but a phase change kit can literally push your CPU to its architechtural limit. Plus you can keep continue to use it if you ever put together a new machine (hopefully).
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w