I recently signed on for a graphic design teaching position in a high school. Currently we have eight emacs (which we will keep), but this years budget allows for approximately $10,000 purchase of computers. The decision needs to be made now so that the school division will have them by September. We will be using CS3, imovie, sketchup with an emphasis on photography and image manipulation. My question is how best to stretch the budget. Would it be wise to 1. buy the 17" imac for education, 2. refurbished 20" imacs of the new generation, or 3. just go all out for the new 20". The computers will be kept for at least 3 years Thanks for the input.