I have an 06 Rubi with the 6 speed. I've got a couple of buddies that have Rubi's with the 5 speed and we've gone back and forth as to which is better. I'm very happy with the six and have had zero issues with it . . . it's much nicer with 33" tires . . . with the stock 31s, first gear was practically useless. From what I have heard the 6 speed is preferred for normal driving for some of the reasons mentioned earlier, but I've heard that the old 5 speed might be a bit stronger. Personally I don't think it really matters all that much and I'd be inclined to decide which to buy based on other factors like milage, price, overall condition of the Jeep, etc.