They are very popular here in NJ as it sounds like you well know. There are many different styles, but the ones my friends and I run are all Higbee sneakboxs. The ones we own were made by various different people around here, but all are derived from the Higbee mold. Slight variations are present like mine is a "two man" cockpit, which is basically just an elongated cockpit cutout, where most of them are the one man version. But, in reality, it's too small for two men in the first place, especially with a spray shield on it like I have. We all run 15 HP motors, not because they need it, but merely for speed. A 10 HP pushes them along just fine if you're not too loaded up with gear. And to answer your rough water question, they are VERY seaworthy for their size, we take them out in open water regularly in the winter time. However, keep in mind we all have some sort of spray shield, that is a must out in the bay, because it keeps the boat dry.