Hiya cirrus,
I edit mostly on a mac, its a no question=final cut. TBH, the only real "black and white" factor really is how the files are, on pc, you can not have any file (non-segmented) over around 2.4 gigs asfaik, while on mac, you have unlimited---so if your not editing full res 5 hour long hd footage, u shud be fine
Try to pick up adobe premier, or sony vegas, alot of people use this when they start editing on a pc

Its probably the best software if you plan to eventually transition to a mac.