A lot depends on your experience level. If it's your first time in Moab, I would run Fins and THings as a warm up. Here is why: It's close to town, it's exciting without being dangerous, it has a bail out half way and you can run the whole thing in a couple of hours. Maybe it's just me, but I would not want to mangle a brand new car.
After Fins, Hell's Revenge is similar terrain, but on a much larger scale. It also is not too difficult (although I think it's a 4, as opposed to Fins 3+). It has a scary(but easy) drop off just after the hot tubs. If you are alone, or inexperienced, I would avoid "Tip Over Challenge" which is near the end of Hell's. There is an easy bypass.
If you want sight-seeing with some easy 4wd thrown in, an ALL day adventure would be the White Rim Trail. Take food water etc. It is spectacular. In my book, this would be a must do. It's perfect terrain for an unmodified truck. It is 100 miles long, so count on 6-8 hours to do the trail. It's worth it.
Kane Creek is incorrectly labeled a 3+. There are some very difficult ledges you must climb on the shelf road and a very difficult waterfall near the end of the trail. I would stay off that if alone, or with a new car.
Poison Spider might be a good choice for your last day. I don't know how the FJC would do on the first waterfall. The good news, it that that is early, so if you had problems, you could bail right there.
Edit-The Charles A. Wells book on Moab is extremely helpful.
