Pretty sure I am leaning toward 5100's

but I have a few questions (and yes, I spent a LONG time reading through threads)....I have a 2008 dbl cab V6 4x4 with a shell. 80,000+ miles and she rides a little squirrely, especially hitting bumps at fwy speeds. I am leaning toward 5100 struts in front and reusing my current springs and replacing the rears with 5100s as well. $315 at for all 4 corners. I don't do any serious wheeling, many dirt roads and rarely, some MILD rock crawling. My truck is stock but I am running slightly larger tires (All Terrains, 265/75/16's) and I do have the rear suspension TSB done. Will the ride be a little firmer? Is it OK to reuse the original springs? Is this a good price? Thanks in advance....