(Posting in both MacPro folder and iMac folder to get opinions from both camps.) I'm torn between getting an iMac 3.06 GHz 24" model vs. a base model MacPro 2.8 GHz Quadcore & NEC 24" H-IPS monitor. Either way, I'd put 4 GB of RAM in the machine and would be using it for professional level Photoshop editing. No video games or video editing or 3D rendering would be done. I know that most Photoshop tasks are not especially processor intensive, but more RAM intensive. The iMac is limited to 4 GB of RAM... but with the MacPro, I could bump that up quite a bit. I do see a slow down when running filters in Photoshop... and that's where I think the speed difference would be most noticible between the 2.8 GHz Quad Core vs. the 3.06 GHz Core2Duo. If I get the mac pro, I'd have to invest another $1000 or so for an NEC 24" H-IPS monitor and another $200 or so for the same video card that the imac 3.06 comes with (Nvidia GeForce 8800). With the iMac 24", I'd be good to go. There would be a considerable price difference ($2200 for the iMac vs. $3400 for the MacPro & NEC monitor). I prefer the versatility of separate brain & monitor, but the $1200 price difference is enough to give me pause. Am I likely to notice a significant difference in speed of using Photoshop filters (running filters in PS is the most processor intensive aspect of Photoshop) between the MacPro 2.8 GHz Quad vs. the iMac's 3.06 GHz Core2Duo? And would the ability to go beyond 4 GB or RAM make a significant speed difference? Would you spend the extra $1200?