nice setup man... the G19's are heaps good hey, i love mine. im running gigabyte 5870's in crossfire and i have no problems at all with any games... run everything max no problems at all! im currently running a HD Sharp tv and a Samsung 2494HS monitor off my cards and can have a movie/music playing on one while watching a movie no probs. still got space to add a couple more monitors on, i see u were planning running 3 monitors, my last card was a gigabyte 5770 and it ran my tv and monitor no probs so i imagine your having no problems with running 2 on ur 5850. I have heard but have never looked into it that its best to keep your graphics cards from the same batch if you want to run crossfire that was the specs of the 2 cards r as close as possible to each other. saying that it might not have any impact at all just something for u to think about. the only problem you may run into is that your 650w psu might not be able to supply enough power... i had an older 650watt psu and i kept on blue screening until i upgraded my psu to a 750watt... also with mine to run in crossfire requires 4 6-pin power connectors so make sure you have enough of them as well... but in saying that ur psu is new so u shouldnt have a problem