Dave G said:
If your talking about the iMac I would not upgrade the processor but the memory. 2 GB instead of just one will help alot with those large photoshop files. The slight difference in processor speed would not really be noticable.
The 250GB hard drive would be fine. You always can get external firewire drives if you need more storage later on.
It depends on your budget as well. You could go with the 20" upgrade the memory and the hard drive and it would be a little cheaper then the lowest 24" price.
Thanks Dave. I was thinking along those lines, and you're giving me some confidence in my thoughts. As for the 20", I'm typing from one right now, and I find that for graphics it's a bit cluttered. After taking the 24" for a spin through PS in the Apple store the other day, I am really spoiled. Money certainly IS an issue, but I may have to suck it up and get that beautiful screen.
If you go for the tower, what size display would you get? The 23" looks nice...then it jumps way up to 30" right? For me that would go beyond practical and into the realm of extravagant, although....
More opinions are still welcome...