I'm torn as to which would be the best and easiest to use. I've used Gimp/Paint Shop Pro for years, but am in no way an expert or professional. However, with the prospect of the iPad, I would love to get one of the following for general goofing. SketchBook Pro ArtStudio for iPad Brushes The Price for ArtStudio is just so tempting ($0.99) and seems just as robust as the others. For anyone who has used these, which would you recommend? Should I just go for the cheapest now or is one of the other 2 just that much better?