A lot is to be considered when choosing equipment for a cave or technical course.  Are you going to do it in backmount or sidemount?  Are you a large individual or do you have a small frame?  Call to discuss equipment that may work best for you.  We highly recommend you do not buy anything without talking to us first.  Early on in our dive careers we made the mistake of buying equipment before talking with someone who is knowledgeable about the type of diving we would be doing.  We relied on internet posts and we ended up buying most of our equipment all over again.  Don't let that happen to you, call us first.