Good that someone on Jeep Forum could help you with your car. Now you'll know what to do if you have a similiar problem with your Jeep
Larger and heavier wheels and tires will wear things quicker; ball joints, u-joint... pretty much anything that sees loads from the mass of the tires and wheels. Most of thet will depend on how hard you wheel it.
Don't waste your time and money on "power ad-ons" you will see very little to no return for your money. Gear your axles properly for our tire size instead and you'll be fine.
For a decent suspension at a reasonable price there are a lot of choices, just research, and then research, and then research some more... I have the Rough Country X Series and like it just fine. Again, it all depends on what you want out of the Jeep.
Good luck and have fun!