hi everyone.recently i went to market and the price range for 5870 was from 390$ for FORCE 3D to 520$ for XFX .i want to know what is goin on in market? is force 3d a bad brand or xfx the best brand? the other thing is that i have heard about problems in ati 5000 series such as gray screen or vertical lines or crashings? with these problems can i buy 5870? thanX