Sorry, but like Countryboy said, that is the quirks of a 2.5 and larger tires. The easy fix is to re-gear. Not cheap, but gives more bang for the buck than go fast items like cold air intake or throttle body spacers etc.
If you are really unhappy with the performance, you may want to sell the 4 banger and replace it with a 4.0 6 cylinder. In my opinion, I say keep the Jeep you have, it looks like a nice one from your avatar and enjoy the fact you don't have to worry about speeding tickets.