yep. you definitely should go full coverage when you renew your insurance coverage because of no-fault accident and uninsured driver. At least it's a good peace of mind to know that you will be completely covered... especially medical expense. Due to bad economy... many drivers have limited coverage or no insurance so they will not be able to pay you and you have no way of collecting full amount. A very costly and time-consuming way is to hire a lawyer to sue them but good luck collecting the money.
With full coverage - your insurance company will pay the rest of amount owed to you by them and then forget about it. (ie. NJ's law requires minimum Bodily Injury Liability coverage to be $15,000 per person/$30,000 per accident so if the driver's limited liability covers up to $15,000 and your medical expense is $40,000. your insurance will pay you $25,000.)
better $228 than $$$$$$$$ legal/medical expenses