A) Dont get the physx card. That thing is a joke.
B) The video card that guy posted will work great for your application. Although for its performance, its awfully pricey. Here are some alternatives...
I realize some will laugh about the Nvidia one, as is is the exact same card, only with better heatsink art.. its 4 dollars more, and is much more atheistic. Which is very important to me, and it may be to you too, so now you have all 2 of your high performance PCI options. :P.