Depends on whether you require an automatic transmission or not (resale is much, much easier with an automatic, even if you have no preference yourself). And whether you would spend an extra $1000 or so to install either a lube pump or driveline disconnect from Remco. Quite a few cars are convertible to 4-down towing.
Here is a link to the 2005 Dinghy Towing Guide, which is published by Motohome Magazine annually. Notice that there are two sections - one for passenger cars and another for Trucks and SUVs. It lists vehicles that can be towed WITHOUT going to Remco for modifications.
http://www.motorhomemagazine.com/dinghytowingguide/2005/DinghyRatings_p16_25.pdf
No Toyota (including Lexus) product with an automatic is authorized for 4-down towing, but I know of a few people who are towing Lexus SUVs at their own risk, with no problems yet. They would not have a leg to stand on if there is a transmission problem, though. The RAV4 SUV manual tranny is officially towable, as are several Toyaota sedans with manual trannys.
Of the Ford automatics, only the Explorer 4WD and F-series 4WD pick-ups are towable without Remco mods (actually, the Explorer needs a minor dealer installed kit too, but I am told it is inexepensive). With manual tranny, the Focus, Escape SUV, Ranger pick-up and 2WD Explorers are towable.
Mazda Tribute (same as Ford Escape) is towable in manual tranny configuration, though Mazda is not listed in the MH dinghy guide.
Several of us here tow Suzuki Grand Vitara 4WD's and think highly of them. They are nicely equipped, comfortable, light in weight, and relatively inexpensive. Plenty of room for two people and gear, too.
