First post ever to a Mac forum! I need to be able to edit very large artwork files in Photoshop, up to 1.5 GB each. The originals are up to 5-ft x 8-ft and must be printed at 300dpi (1.45 GB). The graphics are to be printed on a large printer, the HP Designjet 5500, to the original size. Color accuracy is important; it doesn't have to be "perfect" but it needs to be close. Also, while I *desperately* want to escape Windows XP (The 'Fisher-Price' UI colors are driving me mad. It's so bubbly, warm and happy. Insidious!), a new Mac is barely in the budget. Very tight. My questions are: - Could a 1.6-Ghz G5 Mac handle a 1.5 GB file size, and with how much memory at a minimum? Or would file sizes this large absolutely require a Dual G5? - I have a single-chip 1.8-Ghz Pentium 4 with 512 MB RAM. If I added some more memory do you think it could handle it, at least until I can afford a Dual G5? I've never worked with files this big. - I've heard that Windows color management isn't as good as OS X. Just how different is it from the PC? Is good (maybe not perfect) color possible on a Windows PC? I was told in the Apple section at a CompUSA that Macs have so much better color managment that using a Windows system is much more difficult. If this is true, then why are some software like the PosterJet RIP canceling Mac support? If anyone has worked with graphics files this size I really need your advice. I will be able to afford to upgrade later to a full G5 with all the nice color calibration equipment. But for right now I need to know the minimum specs to get started. Thank you so very much! Your kindness is much appreciated!