I tow a 27FB with my 2009 LX570. She tows exceedingly well after 10k miles in mixed towing through windy stretches, switchback mountain 2-lane roads, and long steep mountain climbs and descents. I personally would not choose to tow with anything else at the moment. Excellent stability, maneuverability, with unbeatable comfort.
I've posted extensively on the subject elsewhere. If you use the adv search, keyword: LX570, user name: pteck, show results as "posts"
This search link tries to capture that but it may not retain - http://www.airforums.com/forums/sear...rchid=10631398
Key to the setup:
1) Keep tow ball as close to the rear bumper as possible. Shortening the drop shank may be necessary to pull it in even tighter. This is absolutely key to optimize on account of the relatively shorter wheelbase.
2) Use a good weight distribution/anti-sway hitch. I personally use an Equalizer. Make sure that there is enough weight distribution tension dialed in. If you feel the steering is light or there is sway, dial in more weight distribution.
3) I personally use load range E LT tires, more because I off-road. The LX570 20" wheels/tires will be fine and great for lateral stability. LC owners with 18" wheels may want to step up to LT tires.
My favorite part of this tow vehicle is being able to visit technical and remote trails once at destinations.