I'm looking at buying a set of steel tanks (new) probably at least hp100's or bigger. But not sure whether to go with worthington's or pst. I have heard not so good things with pst in the past. I dove with lp95's by worthington until somebody figured they needed them more than me. So now i am undecided which company and tank size to go with. Usually use them as singles but want the ability to twin them.