The DSS BP/W is what I have, Larry sells a good one here as well. It honestly doesn't make a huge difference, just decide what size wing you need and go from there. A 30 lb lift should be plenty for most divers by the way.
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<DIV>The crotch strap doesn't bother me much, you get used to it pretty quick by the way. Right now I'd say your BC is too big for you and that's why it slips up.</DIV>