The comment about what platinum cards are for was no doubt in regard to loss damage waiver insurance, which is an expensive car rental ripoff which your card will cover just as well, (with a little more work on your part.)
It may be true that accidents are always the tourist's fault, but THAT is what liability insurance is for, and it is manditory, and included in the cost of the car rental.
I really get tired of all these Mr. know-it alls who talk about how dangerous it is and make ridiculous statements like "it takes special talent to drive in the DR". I guess thats why there are so many Dominican Formula 1 drivers?
If you aren't confident in your own ability to function independently in another country, that's fine, that's you. I get really tired of people on this board who fall into this category apparently (lacking self-confidence) but think they are qualified to tell ME what is not safe for ME to do.
I agree skyblue that it is tough to find a good rate on an SUV rental. Smaller companies like Adventure are a bit less than the big chains for that, while the major companies have better prices on economy cars.