I had a '96 c28mkII and a '99 c320 and while I liked the c28 a lot the c320 was always on my mind. In fact I bought the c28 in the fall and wintered next to a c320 and all winter I was saying to myself even before splashdown of the c28 - that's the boat I really want. The c320 is much faster than the c28 so I may agree with a previous post that it is too much boat for your lake. I say that because the way Narragansett Bay is peppered with islands and sub-bays it is basically a bunch of your lakes patched together but without another section to slip into you would get bored flying back and forth in the same place. I know the c320 certainly shrunk NGBay quite a bit for me.
The quite possibly largest fridge on any 32' boat mentioned is great on the c320 but I think the Ice Box on the c28 will do you fine for cruising around your lake as we cruised out to Block Island and had plenty of cold food for a week.
Wickford/Narragansett Bay RI