Have already replied to your other thread.
But to answer your other q.
Again to re-iterate from the other thread, to play the very latest games (Doom3, HalfLife2, Far Cry etc.. with the highest resolutions, and all the glitzy graphics effects turned on, and if money is not a problem, then the ATI X800, or the GeForce 6800 ultra, would be the desired choices. However for normal games playing, and all the older games UT2K4, Medal of honor, and anything already released, then the Radeon 9800 All In Wonder would be my choice. Again, having said all of that, the supplied 5900 XT should be sufficient to play most games at very good resolutions, and detail settings!
TV Out - is exactly what it says on the tin.. it allows your video card to display a picture on your TV, so you can display your PC desktop on your TV if you wish.
DVI - is a digital video connector, this would only be needed if both the monitor and video card support the connection. Which the supplied monitor does not!