If a picture is worth a thousand words, a benchmark is worth ten thousand. By my reckoning those benchmarks are worth a 130,000 word essay about how the AM2 motherboard market is all about the features, because performance really doesn't change - no matter what chipset you're running.
The Athlon 64's onboard memory controller takes care of the important stuff, thank you, so you can concentrate on the bells and whistles, which is really nice when you think about it. So choose your favorite flavor of icing and don't worry about the cake, AMD has got you covered.
Eight motherboards and not a poor choice among them. What's great about this market is that you can't really lose; none of these boards are horrible at anything, but some of them have really appealing strengths. As far as which is best for you, that's a matter of personal taste. But I've got to admit, that Asus Crosshair sure set itself apart from the pack with a whole shed load of bling-bling.