a couple of the cheaper sites for the top are www.800-923-jeeps.com
. Rather you want to do it or not is entirely a personal choice. The soft tops are louder but easier to go topless. They reduce the weight above the center of gravity but are less secure. You might want to consider just taking the hard top off in summer and rigging a "bikini" type top. The hard top will be snugger in the winter.
Be sure to fill out your profile, it really helps. Also, this site is a valuable resource. Some of the regulars on here are so knowledgable I feel like an idiot. I encourage you to join the American Jeepster Club (www.off-road.com/jeepster/
) It is free but donations are accepted. That site has a lot of useful info, as well. I encourage you to upgrade your electrical system per the hints on that site, if it hasen't been done already.
Welcome to the Wonderful World of Jeepsters!
(P.S. soon you may hear from some of the owners of '72 & '73 "bullnose" commando's. They are kinda like that uncle that no one talks about but keeps showing up...lol)