One of the real biggies is the top option: soft top, hard top, or dual top. This is a very important decision that will have a very significant impact on how much you enjoy your Jeep.
Another biggie is the rear end. If you are gonna do much offroading or are going to go to bigger tires some day, then the Dana 44 rear end could be very important. (Maybe Saharas have the Dana 44 standard? I have a Sport, so I don't know.)
Tell us what you think you will be doing with your Jeep, and tell us what kind of climate you have where you live. These will both be factors in deciding what options are appropriate for you.
Read a lot of posts in here, and get a feel for what others have for options and how they like or dislike them.
Come to Gill's chat room and chat real time with some Jeepers. Go to http://itsajeep.org and from the home page, click on Jeep Chat.
Ask any and all questions you may have about Jeeps. All of us here love to "talk Jeep."
Welcome to this message board, and let me say that I congratulate you on your choice of vehicles!
Have you hugged your Jeep today?