Apple Ipod Touch 8gb… Enough Space?

I'm saving up to get an ipod touch 8gb- but I'm concerned that it won't fit all my stuff. I have around 400 songs, and I'm gonna want to download a buncha "videos"–one's that are only 30-50 minutes. Will I be able to download all of my stuff onto my ipod touch or will there probably not be enough room??

Btw– I'm an avid movie watcher, so I'm gonna have ALOT of movies on it, maybe somewhere from 20-70 (if possible.)

PLEASE HELP!