Eventually I plan on trying the 28" tall M/T SR Radials. Simply b/c they are the only 28" tall and skinny radial front I know of.
I have M/T Sportsmans up front and they suck as far as street driving goes. It drives so much better w/ a pair of 165R15 radials up front, but they're too short. If I wanted a 25"-26" tall tire, I'd just use a 165R15.

FWIW...I've driven my car w/ every possible combination of radials and bias tires on it. Mixing them is not a problem in my opinion. The bias tires just wander and hunt ruts.