Well, my advice is to stick with nVidia if you want it work good with Poser. ATI makes a better gaming card, but for the OpenGL support, you probably want to stick with nVidia. I have an e-GeForce 5200 from eVGA. Supposedly, it is one of the worst cores nVidia ever released, and yet, I get great playback on my games, and Poser runs great. I have never needed the Sree software in Poser, so I cannot complain. If you go with nVidia, I would say anything above the 5200 series is going to be good for you. Considering you are playing with a decent amount of money, you can get a very nice card. I just scanned over some offerings at NewEgg.com, and there are a few 6600 series cards with 128MB on board in your price range. With a little bit of legwork, I am sure you could take a step or two down in the numbers, and find one with more RAM. That should work wonders for your Poser work. Hope that helps.