Lewmar Ocean 60.
I installed a Lewmar Ocean 60 hatch over my V-berth... It cost quite a bit, but it was worth it for me to have a dry place to sleep. You can order the hatch through any of the major discount marine stores (West Marine, Boat/US, Defender, Boater's World, etc). There are two versions of the Ocean 60 hatch- One with a lip that fits into a cut-out in your deck, and the other that screws onto the surface of your deck without the lip. As the hatch is square and the hole is a trapezoid, I used the one without the lip (and saved about $20, if I remember correctly). The hinges and latches fit inside the cut-out in the deck with no additional cutting or fiberglass work. Removing the frame from the old hatch was the hardest part of installing the new one. I think I posted message about the procedure, sometime around June of last year... Check the archives.Good luck!--Jon BastienH25 'Adagio'