Also, nVidia stated they'll have Bezel Management right out the door as they made it a priority to get it in there and get it done properly, which is nice.
that sounds nice. as ATI have yet to have bezel managment after nearly 4 months of release.
but then again I will have to see if nvidia really deliver first..
IMHO to the OP..
unless you really care about the 3D aspect along with surround. your best solution now is to get a Radeon 5870 series card.
because:
1) TH2G matrox don't do native resolution like 1200p or 1080p and it's no as flexiable with the displays as eyefinity. and you would need $200+ on top of the video card purchase just for the th2g device.
2) with Nvidia. supposely you need SLI that would push your budget to get 2 cards and new mobo if yours don't already have dual pcie x16 slots.
3) nvidia is not out yet and we don't really know when it comes how it will work and any kinks on release. I don't trust PR announcements and promises. at least with ATI it's out for a while and some kinks are worked out and theres a good community of people that have tested the cards that u can check for info/advice if u have any problems
the only downside to ATI is that you might need a DP adapter if you monitor doesn't have a DP port. theres the $100 DVI one or the $20-$30 analog VGA one.