Hi i really want to lift my jeep grand cherokee. Its a 2003 Limited edition. I have 245/65/17 tires on it right now, and want either a 2.5 inch coil spring lift or a 2 inch coil spring spacer lift. Which would be better to do. Oh and i will have those tires on it for a while till i get more money for new ones. What should i do?