okay. but that biostar one is very similar, maybe I wouldn't have to reinstall
if you can, "go for broke" and get the best you can. that athlon x4 is still a decent enough chip and when you can upgrade, getting a good board will allow you to get any AMD cpu.
now you *may* be able to contact M$ and tell them you needed to get another motherboard, they *might* help you re-activate windows at no additional cost. i cannot tell you it is a sure thing but it does happen.