has anyone ever had any experience with dual display video cards? has anyone ever set up dual monitors in linux? I want a GF3, and then I was going to use a less powerful card for my second one. but then I heard that there are Dual Display video cards... does anyone know if Linux supports dual video cards, or the dual display video cards? Matrox makes one and ATI does also... check them out thay seem to be pretty good but i am wondering how they would perform in the gaming world. how do you think these would perform overclocked?