Crysis on my rig - how far can I push it?

Hey guys, I'm thinking of buying Crysis. Why? Well, any PC gamer already knows why ;). So, the question is, how far can I push the graphics on my rig? Here it is:

Intel Media Motherboard (a generic one, I don't remember what kind it is exactly)
Thermaltake 750W PSU
nVIDIA GeForce 8800GT Superclocked
Pentium Core2 Quad
A-Data DDR2 800GHz 4GB RAM
WD 500GB SATA HD
Seagate 500GB SATA HD
Windows Vista Home Premium 32bit

Now I don't neccessarily want everything on very high plus max AA, because you would need special Russian black-ops tech for that. But what I would like to know is: what's the max settings I could get away with using this rig? Maybe I could max out with High? Medium? Do I need to switch out my mobo for an nForce and SLI another 8800GT? (by the way I can't afford that right now, but I'm considering doing it next year perhaps).

I say every thing @ High + 2X AA @ 1024x768 resolution. If you want over 1024x768, you have to turn AA to off.

@ 1024x768 + 2X AA most of time you will be over 30FPS.

1280x768

everything high

no AA

will give you a nice framerate between 30-40FPS.