I have a large collection of photos, roughly 4000, with about half being my own photos and the other half being various random pics I've saved over the years. I've always just cataloged them in iPhoto, being meticulous in tagging and organization. However, now that I've gotten more into photography I don't really like having my own pics mixed in with the thousands of other photos I've accumulated. What should I do? I've thought about buying Aperture and moving my photos to it and keeping the rest in iPhoto. I've also considered moving the random pictures into Picasa and keeping my photos in iPhoto. I've even thought about setting up 2 seperate iPhoto libraries. What would you do? The Aperture route may be overkill, but I've never been a big fan of the way Picasa handles folders and seperating everything by year. Any advice would be greatly appreciated.