I'm sorry for getting this thread out of the grave, but found pointless to start a new one for the same subject.
I own a 5850 (PCS+) and tbh the only few games I do play atm are BC2 and CIV 5.
Fallout New Vegas and Crysis 2, haven't made my mind yet to get them on PC or PS3 (and relax on the sofa

)
Now, the iZ3D driver says it supports DX10, the TriDef only DX9 and both cost around £40 yes?
Now £40 is almost half way the cost of a GTX460. Which supports DX11 and I could place it on the second port of my P5Q Deluxe along side the 5850.
So I could use it as Physx when I use the 5850, or for 3D on it's own.
Or is better sell my 5850 and buy a GTX470? Maybe replace the motherboard to an SLI one and buy 2x460s? Any ideas are welcome.
I do have a 650 SLI motherboard, but I cannot clock the Q6600 over 3Ghz, while on the P5Q is working happily at 3.6. So I have to buy a new one.
As for a monitor there is some searching around but probably I will buy the Acer GD245.