You really ought to provide much more details when asking a question like this.
Even if you have several other forum posts, folks don't need to go research your old posts just to answer your question.
The GTX 470 outperforms the ATI 5850 in a lot of cases. However it is going to run hotter, and therefore will be louder (as the cooling fan runs high speed).
As Helltech touched on though, even your motherboard type could affect folk's recommendations. A Crossfire board would allow you to run 2 ATI 5850's someday, where as an SLI motherboard would allow 2 GTX 470's. And some boards support both.
Yadda yadda, etc etc.
What resolution will you be playing at?