Hello! I'm in the market for a new Mac and have come to the conclusion that I just don't know what to buy. Let me start out by letting you all know what I will be doing with the system. I will be multicam editing a TV show that was shot on HDV in 1080i with up to 5 cameras (more likely 3). The bulk of the graphics would be lower thirds. I was looking at a new iMac i7 with 8 gigs of ram but also at the MP's.The specs on the MP's that I can buy are as follows: 1) One 2.93GHz Quad-Core Intel Xeon "Nehalem" processor. 4GB of 1066MHz DDR3 ECC SDRAM NVIDIA GeForce GT 120 with 512MB GDDR3 memory. 2) One 2.66GHz Quad-Core Intel Xeon "Nehalem" processor. 6GB of 1066MHz DDR3 ECC SDRAM NVIDIA GeForce GT 120 with 512MB GDDR3 memory. 3) *08/01/2008* Processor: Two 2.8GHz Quad-Core Intel Xeon processors Memory: 8GB (four 2GB) of 800MHz DDR2 ATI Radeon HD 2600 XT 256MB 320GB Serial ATA 3Gb/s; 7200 rpm; 8MB cache + 750GB Serial ATA 3Gb/s; 7200 rpm; 8MB cache The 3 MP's are used but in great condition and ALL of the systems are within a few $100 dollars of each other. really like the iMac, but am worried it wont be enough. And since they are all around the same price (the iMac is the most expensive) I have no clue what to do. Any advice would be much appreciated!