My computer is beginning to feel a little tired, so I'm thinking about an upgrade. Right now I'm using a 2.0 Ghz/ DP/4.5 Gb Ram (single core) G5 PowerMac, mainly to run Photoshop CS2 and Cinema 4D. I'm retouching high-res files of 200-500 MB, and render in fairly high quality in C4D; while my rig's performance is still ok in PS, rendering in Cinema really isn't much fun ... 1: So I'm wondering, what sort of performance gains can I expect from switching to a MacPro ? I'm considering the 2.8 Ghz DP/ 8 core model, 8 GB Ram, GeForce 8800 GT (running both a 23" and 20" ACD), as the basic configuration, and upgrading Photoshop to CS3/4. 2: Is it worth considering the 3.0/3.2 Ghz versions, which are quite a bit more pricey, or maybe rather add more Ram, or a second GPU (Leopard/ CS4) ? 3: The inevitable question: Buy now or wait for the new chips, might those offer a considerable increase in performance for my needs ? I'd like to buy within 6 months, am not too fond of 1st generation models, and will need Firewire for my Digital Camera Back. Any advice and shared experiences would be much appreciated .