The LX is very nice, but I use it to tow my 26' travel trailer and the AHC makes hooking up the weight distribution hitch (WDH) a bit of a pain, since the truck's suspension is never in the same spot (dynamic with the AHC system). I am not sure if you have used a WDH, but you set it up to have the trailer level (tandem axle) when hitched. With the AHC, the truck is NORMAL at a height range, so it is really never in the same height... now this is a rather small range, but it does make a HUGE difference when trying to put the bars on or off the hitch, which can be a REAL pain in my back. BTW, I have a bad disk and this does not help.
So, I was thinking of going to a 2013 or new LC, which would give me similar electronics as my 2010 LX, but with a few nice changes, plus a static suspension, which would make towing much easier. I was also thinking of maybe going to a Tundra TRD PRO, but I have not made my mind up yet.
Otherwise, the ride in the LX is extremely nice and actually, having the AHC provide a greater than 2" lift when in HIGH is REALLY nice off road.