Looking at the specs for the single 1.25 G4 PM and the 1GHz iMac they seem really similar. They both use the same RAM, system bus, hard drive, The difference is the 64 and 32 bit video cards and absence of L3 cache in the iMac. What does this ultimately mean in terms of photoshop use? Also the .25 difference in processor. To me they seem kind of similar. This will be for my girl friend who is a photographer. How do they compare if at all?