"I owned an '03 4x4 X and now have an '06 4x4 X. More power and a little better feel is why I upgraded. I have taken both X's all over the US and neither failed me. From the snow to the sand and mud the X is very solid, all factory no upgrades on the '03 and I did get better tires for the '06. Wrangler SilentArmor tires, They have little wear after about 28k. Worth the extra cash for the tire upgrade."