I haven't justified the cost for myself to own either zbaas or vs. However, in the grand scale of hobbies, even the zbaas is relatively affordable. It is cheaper than a harley, a sail boat, a fishing boat, a vacation, and about the same as alot of tv's or golf clubs these days. You'd have a hard time buying new diving equipment for those prices. Heck my brother spends that much on a pair of pipes for his bike and doesn't blink. If you want it, can afford it, and will use it... why not? Also-it is much much cheaper than an engagement ring and alot of us bought them
