I am a domestic user and I am thinking to buy my first photography app. I don't know to use any of them. I'll have to learn about it. I read Aperture 3 and Pixelmator are great apps and their prices are so good on Mac App Store. Both have the same feature for begginers? Considering the price ($79 x $29), does it make sense for me as a relative novice to start with Aperture 3 as my first management and editing program? Thanks!