I'm actually considering the same board for my build assuming I don't go with 890gx instead. From the reviews I've seen its just as good as the Asus and Gigabyte brand. It does fall behind in the benchmarks though and there was so issues with the onboard overclocking. All in all I think its a nice board and much prettier than the competition.
It is what I am typing on right now and it is awesome!!! You can unlock cores, overclock anything, plus the 2600Mhz transfer speed is amazing. With this board, my system is always waiting on the Hard Drive, so you won't even reach this board's potential without an SSD.
I prefer MSI mobos for AMD processors. Never had an issue with any of them.
I could care less about the included Videocard on 890GX motherboard since I will be installing an ATI HD 5870, but for my price range the 890FX is just not with in my budget. Not to mention I would never end using the the Dual 16x Pcie slots, so it just gonna have to be 890GX for me this time around. I wish Msi made a comparable motherboard for the 890gx chipset, the mini-atx one just would never fit my purposes not to mention it would look awful small in my case. I have had good experience with MSI though I have a computer with a MSI motherboard build back in 2002 and it still works like a charm.