Since your budget minded, lunch box style locker in the rear will get you started. Aussie IMHO makes the best bang for the buck lunch box locker. you can have your rear locked for about $200. as for the front, I would just do the same. on dry and wet pavement, you will never know it is there, in 4wd in snow, it will drive similar to a FWD car around corners. some poeple complain about it, personally I would just deal with it.