EHOH! I'm curious about this as well. I was looking at the 150lb weight vests, I think Vmax or something makes them and as far as ik they have two different styles, one for comfort and one for OH mobility. I will probably purchase one in a few weeks or so only because it has free shipping and upload pics and give a review.
As far as my old weight vest, i think it was a 20 or 40lb one from walmart, Golds gym brand I think, something cheap. It did the job for what I needed it too, just running sucked in it because it'd come loose so definitely go for quality.