You pay a premium for the SLI version. I don't think that is a "real" price for the Premium. Yeah, when it first comes out, maybe, but it should be closer to the other offerings at this point, somewhere around US$150. So, you're paying at least $30-50 for something that may not be needed.
I don't really care about the WiFi, as I probably won't even use it, considering my router is located right above the TV in my setup. It's just the fact that it was going to come factory passively cooled, that is nice. Requires less work on my part, and if something goes wrong with the MB, it means I have to first remove the Zalman, reinstall their fan, and then send the board back. Otherwise they may blame the problem on the aftermarket cooler, when it may not be related.
I have no need for the board, for at least 3 weeks, so there is no point in buying it now. I just figure, if the Premium comes out in this time frame, then I'll go for it, otherwise, you are right, might as well just get the SLI version... I have heard that someone is using the exact same board in the case I'm getting, so it may be a better way to go with anyway, as the road will be paved before me!