What you mean my friend ? you tried 10.8.2 with new nVidia drivers and CL patching ?
Any news about enabling the GPU accelerated video decoding? It's the only thing that keeps me stuck to 10.7.4
If I update to 10.7.5 , i loose the accelerated decoding as well. It never worked in Mountain Lion.
I hope that maybe some version of Mountain Lion will bring it back.
I think this is much better for you with nVidia 550Ti, and not 10.7.4