 I traded in my 06 Tacoma Prerunner Double Cab Long Bed TRD Sport for an SR5 Crewmax Short bed with 5.7 6 AT.  The Crewmax takes regular gas at 87 octane compared to the 92 octane that the Tacoma required.  The Tundra accelerates with ease, and the ride is very smooth.  I love the rear seat space.  It is huge back there, and my family can relax during long drives from Vegas to Orange County.  So far, the Tundra is a winner.  I just hope that my 5.7 is not one of those with a defective camshaft that grounded about 20 5.7s so far.   