Which iPad should I get?

I already have an iPhone 4, but I'm trading in a few of my old phones and my old iPod that I don't use any more (since getting an iPhone) to get an iPad.

My choice is:

-iPad 1 32GB
-iPad 2 16GB

I'm not really bothered about the cameras because I have an iPhone for that I guess. I would use it mainly for films / videos / TV, Apps / Gaming (especially Garageband and other music production / recording apps), and general web browsing.

What do you guys recommend? The extra space if I get the iPad 1 would be nice, but is the iPad 2 worth getting because of the performance upgrades? Will I notice them?