If your jeep never sees snow you could go with an automatic locker in the dana 30 about $2-300 and the install isn't too bad. Of course you will have to accept the ratcheting noise unless you go with Powertrax No-Slip locker.
I went with the Aussie torq locker, super easy to install and they market that it's stronger than the others since it has less parts. I don't mind the ratcheting noise since I know it's normal but it will turn heads and people will think your jeep might fall apart. I even had a fellow Jeeper come over at the gas pump and warn me that I had a noise.