Well, I'm debating between a set of BT-45's, and a set of Sport Demons.
My OCD leads me to only want one type of tire. Most people seem to get okay mileage out of the BT45's, so they should be fine for me. I'm hesitant to get the pirelli's, as they make the metzelers. Although not being made in brazil seems to be a good selling point.
In addition, I plan to get the ME88's replaced under warranty, and then use the replacement ones for touring. 20 bucks to get them mounted saves 1/2 of a nice set of tires this summer, when I will be doing 3k+ miles.