The best editing system out is the media 100 with the ICE card (renderless video editing) it is only for mac only.
The best windows based editor is Adobe Premiere Pro 1.5 w/ After Effects. The program is AWESOME , but it took me 2 weeks to learn it by just trial and error, that it the best way to learn.
INTEL i7 930
3x2gb Corsair Dominators
EVGA GTX 480