Hello, As many of you know by now I just got a G5 Quad.. works great, however the noisy GT 7800 is driving me crazy. I need to know which video card would be more cost effective and also which one is quieter.. I am in a decision to either get the 6600 which has no fan, but a huge black heatsink. or the Quadro fx 4500. 1. Which card is much quieter? 2. Is the Quadro x 4500 really the end of the line if I want a nice and powerful + QUIET and noiseless compared to what I have now the GT 7800? Need to make quick decision.. as I want to get rid of this 7800 GT; its noise is too unbearable.