I have an 09 Double Cab, Long Bed TRD Sport. I am having the Leaf Spring TSB done at the dealer late this week. I have heard that this will cause the rear end to sit a little higher? I eventually want 2- 3 inches of lift all around and level. My wife and I have a baby on the way and I would like the smoothest ride and the least amount of upkeep for the future. I have thought about getting the 5100s all around...would this be enough and give me a good ride with enough room to fit 285s and new wheels?