Show this to your wife. That would take care of the second issue. LOL. From my experience I found that mixing video cards on a the same box is asking for trouble. I would not even want to count on the built-in video out on the box when adding PCI video cards. My old setup: http://www.elitetrader.com/vb/showthread.php?threadid=43661&perpage=6&pagenumber=428
Update. Pros: Quieter-old single card had integral fan. Cheap-under $100 for 4 monitor capability. My son thinks it's cool. Cons: 3 monitors would have been sufficient. My wife maintains her (glaring) silence.