The GTX260 will
CURRENTLY give more performance, but as the drivers mature, the 5750 will perform better.
You should get this instead(NEWEGG IS ONLY A REFERENCE FOR THIS):
http://www.newegg.com/Product/Produc...82E16835181010
If you live by a Fry's or Bestbuy, go there now and buy that.
Basically rivals the TRUE but for less if you can get it on sale. Currently ~$50 last time I checked at the two retailers I mentioned.