I bought this bimini last year on Ebay for $210 including shipping.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&viewitem=&item=4583349325It has worked fabulously. If I had to do it again I would have tried to get it 8-12" longer. This would it give it 3-4' overhang over both hatches. Mine is white marine vinyl, I think I will go for sunbrella, next time.
It is not a high end unit but has worked perfectly.
I mounted it on the stantions at the center of the cockpit with shaft collars from
http://www.staffordmfg.com/. They are stainless steel and allow you to raise and lower the bimini with a few turns of an allen wrench. On a passage is is great to have the biminin low to increase shade and decrease windage. With it higher I have standing headroom even with a mainsail that is oversized.
For some reason I will cannot post an attachment. I will try to post some pics at some point.
I fold the bimini backward onto the aft cabin when not in use. I have no problems going forward or aft with the bimini up.
This had improved my PD more than anything other than my new mainsail. I don't know how I lived without it.
Enjoy,
Bob