he's right, imovie is pretty much the only option unless you're willing to use torrents to get the high class stuff.
and if you do, i wouldnt use final cut.
yeah its a way nice program, but it is in no way similar to imovie.
if ur used to imovie, final cut will be giving you a migraine in under 10 minutes.
trust me, ive been there.
may i recommend adobe after effects?
lots of editing options, and nowhere near as complex as final cut