i have migrated through all 4 versions of lightroom, i have cs4 and have not even opened it for use in probably the better part of a year. i have been studying scott kelby's instructional materials and have a multiseries video tutorial i purchased from luminescent landscape. i can't at present see any reason to get an upgrade for photoshop, lightroom seems to be able to do all i want, and once you start to learn about how to make presets, which function much like ps actions, processing gets much easier. plus there are a ton of free presets available on the web, and a number of plugins that are free that do many neat things such as geoencode, edit and order metadata, and many other things. i feel that unless you are in the graphic arts arena, earning money from that there is no need for a hobbyist photographer to own more than lightroom. just my 0.2 worth