I have noticed that pro-photgraphers tend to use Power Macs (with the tower) as oppossed to i-Macs. Is this just because they need the fastest processor, maximum RAM and hard drive space? I want a pro set-up but don't want to blow the budget so I'm thinking about finding a used Power Mac and loading it with a used older version of Adobe Phtosope (like CS2). I figure I would want to go with at least a G5 processor, OSX 10.4, 540 mb or RAM and a 200 gigabyte hardrive. Is this crazy?