Hi all. Within a month, I plan to buy a new computer. I am a professional graphic designer and I need good work station. I am thinking of buying iMac 27" 2.93GHz Quad-Core Intel Core i7 with 16GB RAM or Mac Pro with One 2.8GHz Quad-Core Intel Xeon and 16GB RAM as well. My primary work tool is Adobe Photoshop CS 5. Generally I work with files 5K+ px and size 2GB. Sometimes I run Adobe After Effects and render in very high resolution. Like I said I need work station to hard work. I can not afford on overheat or other issues. Can you advise me what will be a better choice?