I use lightroom (and I have a mac) for photo editing- after a recommendation on a SLR course. I think it's great, very user friendly, combines a library tagging entity with the developing mode of use too. currently selling on amazon for £200 - still a load, but less than £600.

I have no idea, however, how easy it would be to get it to do the fretboard positioning's on your videos.

Jems