So, finally got my G5 stock 2.5, and was going to order RAM from Crucial. How much is adequate (without breaking my bank acct) for Photoshop work (working with RAW files 13-15 mb) and video editing with Final Cut Express? I was thinking of adding 2 more gigs for a total of 2.5. Is that overkill, can i go with less or does that sound about right? Thanks. 