I think you’re asking for a lot of ‘on-the-fly’ processing. I generally do all my color correction and visual traetment, then click the split-screen view and select-all to disable the viewing of plugins while I edit and cut.
You can turn them back on at any time to see what a particular edit would be like.
I have 12-real cores and I don’t get full speed smoothness when using plugins that effect full frames.
Jeff
2-Xeon X5680 @ 3.33, EVGA SR-2 Mobo, 48GB DDR3, GTX 580 3072MB, 16TB Attached Storage, Win7, Vegas 11 x64