Got some Nitto Terra Grapplers installed yesterday on my 2008 GX470. I've only put about 60 miles on them so far, but I'm loving them. They ride smooth for an A/T tire and I think they look good. These are 265/65/17's - same size as stock. Gas mileage seems to have improved a bit over the General Grabbers that were replaced, but that could just be because the alignment was off and has been corrected.
Looking forward to seeing how these things do in the snow!