it often comes down to
How much £££ u got etc
but im not too keen on Asus, i swear by Abit and MSI as they have served me well for many years so i would look at those brands in my opinion.
As for the model it really does depend on the things above, it is probably best to look around and find a few boards that suit the spec you wanna build and how much u wanna spend and ask about them, otherwise you are likely to get a respnse with hundreds of different boards and be just as lost !!
Hope that helps