FFXI on a 6600GTFollow

Sorry if this has been asked before but....

Does anyone play FFXI on a GeForce 6600 GT? If so, how well does it play and what settings do you have it on. I would like some feedback before I think about purchasing it. I currently am using a eVGA GeForce FX 5500. I was wondering if it is that big of a step up.

Thanks in advance