So here is my opinion, to consider with everyone else. I believe you should buy gear as early in your diving career as is practical. That is, when you know the basic conditions in which you will be doing most of your diving. I am also in favor of new gear purchased from a dive center with a service department, that comes with a warranty. I have purchased used gear, but only if I have known its history- including use level and service history, and only after I became competent to do a lot of my own servicing. New gear, properly cared for and regularly serviced, will last for a loooong time and be worth the value spent. You can add accessories and stuff as time passes. For diving In the San Diego SO Cal area cold water gear is essential. That inslude a reg that will operate efficiently in colder water. Of course, if you are a compulsive buyer like me, you will end up with a cold water rig, a warm water rig, a training rig, and a pool rig. So that last rule of equipment buying is to know that once you start, it's hard to stop.
DivemasterDennis
DivemasterDennis