Replying to What Mac should I get?

So I've read some threads but I'm just not sure. I like my current mac (desktop) that I share with my little brother a lot. But it's getting super slow. It's taking me so long to do my homework right now. It's not that old it's just not powerful enough for me.

It has like 4GB of ram and has a 2.5 ghz Intel i5. So I'm getting a laptop here in the next month for college. Which one should I get? Should I upgrade the MacBook Air as much as I can or should I get a MacBook Pro? I don't want to break the bank but my current computer is so slow and I need something powerful. Putting together edits for school, ski edits, photography, and homework is quite a bit of stuff for this computer to be working with.