Hi, I am a new user to these forums though I have been reading them for a while. I am an artist, digital painter and use modo a bit to make some basic scenes to paint over sometimes also. I use zbrush for sculpting work. My question is. I have a 2008 Mac Pro (3,1) 6gb 800mhz ram (two slots free), 2.8ghz quad core (x2), 8800gtx 512mb, 500gb 7200rpm, 1TB 7200RPM. I am wondering if it would be worth putting more ram and a 5870 card in this old machine or would it be wiser to purchase a new up to date system. Also if it is a wise choice to upgrade to a new system? Maybe an SSD too but I know this machine only support SATA2 Would the mac book pro be ok for sculpting in zbrush or large document work in photoshop and modo performance and heat wise? I don't travel often and can get along ok without my computer while away but it would be nice to have it there also. The iMac or the Mac Pro would be the other choice. Once again, any heat issues with the iMac that I should know about for 'professional' apps? The Mac Pro is a great cost and it seems a bit overkill for what I need but I do love that there is no heat constraints and also the fact that I can easily clean the dust out and perhaps update parts. Any advice would be greatly appreciated! Thanks!