Jeff is exactly right. As far as NLE’s go you pretty much have your pick nowadays – Adobe Premiere Pro, FCP7, FCPX, Avid Media Composer, Sony Vegas….you can find all these NLE’s in nearly every aspect of post-production somewhere. It’s up to you what you are comfortable with and what type of editing you do.
I would ultimately suggest moving away from FCP7 because it is no longer in development – no patches, no fixes, no support, no development. Apple has moved onto FCPX. Final Cut Studio, as we knew it up to 2011 is no longer supported by Apple. That’s not to say you can’t use it, but be aware that if you go that route your on your own. The last supported OS for FCP 7.0.3 was Mac OSX 10.6.8 (Snow Leopard).
Ryan Holmes
http://www.ryanholmes.me
vimeo.com/ryanholmes