I am kind of in the same boat as you. I have 56K on my'05 LE with the original Grabber tires. Yes they definately suck. Horrible in winter conditions. I want to get them replaced this fall as I can't get through another winter with them.
Anyway, I've been debating on what tire to go with. I'm actually thinking of going with 265/70 17's instead of the stock 265/65 17's. My speedo has always been off since the day I bought my truck. When it reads 73mph I'm actaully only going 70mph. So this means I really only have about 54k miles on my truck. My thought was that going a little taller on the tire would fix my speedo. I assume I'll have enough room in the wheel well.
Secondly, I don't do any hard core off road other than gravel backroads with occasional mud puddles so no need for huge treaded grapplers or anything like that. I am however open to an AT tire rather than a highway tire.
I've kind of been thinking maybe the Geolander AT/S, Grabber AT2, Destination A/T, or maybe even Dualer A/T Revo2 depending on price.
Or maybe something you guys recommendation?
BTW, How reliable are tire rack reviews? Heres a rundown of AT tires in my size