Today I reserved my iPhone 4, but I got a 16 gig instead of a 32 gig version. Will this be a noticeable difference? My current iPod Touch is a 32 gig model, and I currently have 27 gigs left on it and I've had it since April 3rd. Do you guys think I'll fill it up before my 2 year contract is over? If I do, is there anyway I can add more space? Thanks for the help.