I could never see getting the trd trims for being driven here. We have mostly highway with little off road use to play with. It seems toyota dealers still sell more trd's than all other trims...go figure when 98% of their owners never drive them on much more than an improved dirt road, plus they seem to have far more serious issues down the road than the other trims. I've always had sr5 toyota's, and they been ultra reliable.
Imo, unless you're a more serious off-roader, there's no need for a trd, these sr5's do just fine.