depends on what you want to do with your jeep... drive it to the mall or become a wheeling warrior...
my advise would be to learn from others mistakes, do your homework, go on the trails and see what works with other jeeps and you will get a better understanding on what you will need opposed to what you would like to have. I learned the hard way with a few of my mods but its water under the bridge now... moving forward whatever i add to the jeep i make sure it is necessary for what i want to do and purchase the one that gets good reviews.
remember, with most mods just like anything else in life you will get what you pay for.
....and then the priest says "Hey!!! That's not my underwear"