film major here, here's some actual advice:
AVID is the (film) industry standard for the most part. (I don't know what the SKI film industry standard is, prolly FCP) Avid is expensive as fuck, but worth it if you know how to use it. If you are a student (like at the U of Utah, where I go) you can get the package deal of Avid for 299$(?), which is a steal and a half.
that being said, Final Cut is a great program, its just that since Final Cut X came out and blew camel dicks it's clear that Apple is going to stop developing editing programs in general, and will only get worse. So torrent Final Cut 7 or something and it'll work fine for what you're finna do. But if you're really into the latest shit, and don't mind a steep learning curve, Avid is upgraded like five times a year.
also, you can download Avid for free from their site; 30 day trial to test that mafucka out.
I've used Adobe Premiere, as well as Sony Vegas for awhile, I'm not really into either of them. The Adobe suite is tight though because of After Effects.
imovie is imovie, don't expect too much.
(PS, I happen to like final cut best, I still use 7 pretty much exclusively, but that's because I've used it the longest.)