Adobe Premier so I've heard is pretty good, although not from experiance. Sorry not got a clue what cost it is. try dowloading it for free from filemirrors.com or Kazaa, thats how i got photoshop (thats over a grand for a liscense so i was told)
I had a life once..... but then i started boarding
what type of computer is it? cause if its a mac i would definatly go with Final Cut Pro 4 but i think its like 1000 but talk to a teacher at you school that you are cool with cause teachers can get it for like 300. but unfortunatly if you are using a PC u would definatly go with Adobe Premiere....or Shake 3 but its like 10 g's...but i doubt u have that type of money. good luck
if your skint like me go pirate. www.filemirrors has plenty of good downloads, as does kazaa (although make sure you got an up to date virus scanner first).
If there are any markets around you then check them out. If you need a serial code for it there are a number of websites you can get one of: