Just wondering what the pros/cons are of upgrading Aperture vs buying a new full retail version. I am getting a new iMac when all the issues are sorted out and if I get the Aperture 3 upgrade it means installing Aperture, then installing the upgrade to 2, then installing the upgrade to 3. Seems like kind of a pain. Also curious if I end up with the exact same result by upgrading as if I were to just buy the retail version. For example, will doing the double upgrade take up more space on my drive than just installing a new version? Thanks in advance.