Which is better 4wheeler/jeeps

The Cherokee's inline 6 has plenty of grunt. My daughter bought one for $200 because it had a cooling problem (it came with a closed loop cooling system). She changed that to an open system and drove it for 2 years, only problem was a crank position sensor (mounted in the back of the block sandwiched into the firewall) that would get a bad connection with the connecting terminal and the Jeep wouldn't start till ya wiggled it around. Good trail rig when running right. I'd recommend upgrading axles if you're going to big tires.