Personally an Abit fan myself - http://www.abit.com.tw.
MSI and Asus both support 'dangerous' dynamic overclocking, incorrect PEG Link Mode defaults, etc, which leads to problems down the track every time. Sure it is 3% faster in benchmarks, but you pay for it eventually. Asus used to be good, 2-3+ years ago. MSI made CoreCell, and that was a fools idea. Dynamic Overclocking = Instability, and then people add static overclocking to the dynamic overcloking and wonder why it isn't stable. :roll: (11+ years experience in IT hardware talking here btw).
If you are not after SLI, and just want to replace old video with new (better than going 2, what will be mid-range, cards in the long run) why are you looking at those boards ?
You're aware 3 x PCIe x16 slots is just going to run 1 x PCIe x16, or 2 x PCIe x8/x16 on the two outermost slots right ? - As in it doesn't give you 3 x PCIe x16 slots you can all use at once.
Consider saving $140 (give or take) on mainboard and investing that $140 into CPU, Video Card, and/or RAM.
Not that I am recommending, or suggesting it, and for example purposes only I'll re-use the above board. As it is one of the 'cheaper' (cost wise) ones on the market, Consider having a look at the benchmarks here:
http://www.pcstats.com/articleview.cfm?articleID=1865
Remeber to look at the benchmarks with equal video cards for it though.
You'll notice a very small gap between it and most other boards performance wise. (Bear in mind other boards might be preoverclocked +3%, and 100 MHz FSB on them is really 103 MHz FSB - Which is easy enough to do on any mainboard btw). 8)