Crucial is a very good brand & a lot of people on these forums use them. They're not much into the "extreme performance" scene but have introduced their ballistix series to try & catch up with the Corsair & Kingston brands. They have a lifetime warranty so you can't go wrong by choosing them.
As for the best ram for your board, it all depends on what you intend to do with it. We can't recommend the same things if you're into overclcoking or not, etc.
I'm using that board with the 64-bit 3200+ and am using the Kingston memory that's recommended on Asus' website (as per Mr. G's instructions). The system's rock solid. Running 2 x 512 for a full Gig. Hope that helps a little.