i have been thinking of switching myself...
i have to admitt i am a little worried going to bias, my truck can sit sometimes and i am worried about permanent flat spots or i might not like the performance.
Jredsjeep, I've been thinking about your post and how to best respond to it...
There are definite disadvantages to running bias ply tires on dry pavements... and that's why I run radial A/T type tires during the mid-summer months. If you drive dry pavement for any distance you'll probably be disappointed with bias ply tires... my truck rarely goes more than 6-8 miles on dry pavement (to town and back) during winter. But dirt, gravel, crushed rock and sand roads are not pavement.
I found this article on an off-road web site that really does a good job of explaining the differences and advantages/disadvantages of both tire types... along with the different construction materials. If you read it I think you'll see the bias ply is clearly the better off-pavement and snow tire... but, depending on the amount of time your truck spends on dry pavement, bias ply may not necessarily be the right tire for you. When reading it, and forming your decision, don't make light of the fact I run a radial A/T type during fair weather... and that's when my pavement driving is probably still less than 30% of the total.
http://www.off-road.com/trucks-4x4/tech/technical-article-19432.html#comparison