I hope the shop is a good one that will let you decide what you want and not try to talk you into a bunch of useless junk. A BPW with hog harness is indeed the most versatile. I'd also advise that you dive it with singles for awhile before going into doubles. Unless your experience recently has been at a stepped up pace 150 dives over 10 years mostly warm water is not much experience when it comes to considering a tech path. There are some tech instructors that would like to see 100 dives in say the last 2 years before starting. You can take an intro to tech or better yet a fundies class. But again stay with simple proven designs and don;t let lots of drings, padding, quick releases, etc wow you. They are not needed and you also don;t need to spend 700 bucks on a set up. As one poster already noted 300 will get a nice basic rig that will serve you well. And once you start down this path be advised that the money you saved will get spent. Sooner rather than later probably and will also be a lot more than you expect. Doubles, regs, stages, lights, drysuit, etc. Welcome to the dark side. Now open your wallet wide.