My thoughts on it are this...
There are three things I will simply NOT skimp on when buying a new PC that I want high performance out of...
CPU
Graphics Card
RAM
The CPU effects everything, literally everything

So dont skimp.
The graphics card is going to be doing a lot of work. Supposedly the new version of PS uses the graphics card a lot more too and that helps speed up your workflow. On that alone I wouldnt buy one of the cheaper cards.
RAM is going to facilitate higher speed with everything you're doing, as I think we already discussed in this thread.
Anyway, going with a relatively cheap card is just not a good idea, imo. I know that one you're looking at isnt CHEAP cheap, but it's cheaper than the price point I normally look at for video cards.
At the end of that article he states that the GeForce GTS 250 is the NVIDIA version of the card you're looking at and that it performs better, so that's something to think about.
Anyway, I'm guilty of brand loyalty just like everyone else, so dont let me talk you into buying a NVIDIA card if you really feel ATI is the way to go

I just know what has worked for me in the past.