it's the straps, go with poles up front.

I second that. Someone suggested looking at the Cobalt Bimini, They use poles up front and have cross bracing in the rear to keep it from rocking side to side. They are also made of Stainless Steel. A 150lb man could probably do chin-ups on the Cobalt Bimini.

Anyone know if Cobalt out sources there Bimini's?

I blew the bimini off my Cobalt last week, 45+ into a headwind. It bent the front bow of the stainless frame(!)and tore the center pocket out of the fabric where it meets the middle bow. the repair guy says Cobalt makes their own bimini's and are top notch, just don't expect them to hold up at high speed. Mine had straps in front, but I'm not sure it would have held up anyway, sunlight does weaken the thread over time and this may have contributed to the failure. straps are now junk as the adjustment buckles broke and will need to be replaced. I'm going to look into retrofitting stainless poles, but won't drive fast into a gusty headwind again...