HD Video + Mac Mini

I am hoping to purchase this Mac Mini:

Intel Core Duo,
2 Ghz
2 gb RAM

Really want a Mac setup, and the mini seems most cost effective way of doing this. I am aware you can upgrade to more RAM, but will this mini as it is be sufficient to view HD video, and edit in iMovie and/or final cut?

If not, what upgrade would I need?

Would really appreciate any response, all these Ghz and RAM numbers are whirling round my brain and don't seem to make sense.