So I'll be buying a PC dedicated for art for the first time. I know absolutely nothing about building PCs, so right now I plan on buying one already made. I was looking at the various desktops on HP's website and I'm not sure which ones are good for art or are totally overkill. Ideally I'd like to have a computer that doesn't lag when I try to paint on very large images or with big brushes, which is what my computer does right now. I can hardly use Painter for this reason. I don't plan on playing many games on this computer so that isn't an issue.
This is the one for the Elite Desktop PCs-
I'm willing to spend money to buy a nice PC to run CS5 and Painter 11, but I don't really have any idea which of those fits what I need.
This computer hardware illiterate artist would appreciate any help he can get