Gary:
If you're seriously considering a Liberty, you might want to consider the diesel because of its torque at operating rpm is optimal for pulling power while towing. The gas engine produces a theoretical 235 pounds, it's only theoretical since it takes 4000 rpm to get it. Although I've had no problem pulling the CD, if I had the diesel, I'm sure I wouldn't have to downshift to Drive with all that torque, and mileage would be greatly improved towing in overdrive. When I got mine, you had to get the Limited to get the higher-geared transmission, and be sure to check that out as the one they specify in the website is the one you want.
Take a look at the comparisons:
http://www.allpar.com/model/jeep/liberty-2005.html
Brakes (from the same site):
http://www.allpar.com/model/jeep/liberty.html
Jeep Liberty features several braking system enhancements to deliver even more safety, durability and performance. Since heat is one of the biggest contributors to premature brake wear and loss of braking effectiveness, Liberty brakes were heat-tested in the parched desert of Death Valley, California, and in the grueling stop-and-go rush-hour traffic of Los Angeles. Major improvements over previous brake systems include larger, more robust rotors and drums and greater cooling capacity. The result is reduced brake fade (the loss of braking effectiveness as brakes heat up) and a longer life for Liberty's brake linings.
An available integrated anti-lock braking system (ABS) includes Electronic Brake Distribution (EBD), which automatically distributes braking forces between the front and rear axles, depending on how they can be used best, and adapts to variations in road surface and vehicle load. The system can be used off-road, since it allows for limited wheel lockup as needed, such as when the vehicle is descending steep sand or gravel hills. Liberty's ABS also is designed to limit false activation on bumpy surfaces, such as at railroad crossings and on the rough "washboard" surfaces of gravel roads.