I'm still hanging in there with my powermac g5 from 2004 (dual 1.8 g5, 2gb ram, ati 9800xt 256mb). I do a lot of photo processing, and some video editing. This summer i'll be upgrading my SLR (10mp to 15mp), and I'll also be shooting 720p 30fps video. I'm thinking I should upgrade my computer the same time as the camera. The g5 has leopard and CS3, Apeture, Final cut pro. these programs are really chugging along (sigh, the g5 used to be SOOO fast). SO my question is... will the new iMac (3.06, 4gb ram, ATI HD) be a noticeable bump in performance, worth the upgrade? Also, how much should I sell my g5 for (including the aluminum 20" apple cinema display).' thanks!