Jassman is pretty much spot on regarding the handling. I never noticed a porpois on mine, but depending on conditions it does like a little tab every now and then. IMO the 37 OL is one of the best hulls out there. It's almost weird how the boat manages to be quick and responsive but also a wave crusher. You don't need to "drive" it as much as with some of the multi-step hulls. Mine will do 82 with bone stock HP 500s, AC and a generator.
I say stick with a twin boat, don't be afraid of bravos as long as you get mild power. One of my requirements was stock merc power. Sure, 6's are great but many of the #6 boats have custom big blower motors. Depends what you're looking for I guess.
Some of the 37's had really wild paint and interior colors that 10 years later just looks outdated. That was my biggest hurdle before I found my boat, I wanted simple paint and white interior. Good luck, if you pull the trigger on an OL you won't be disappointed.