Best places in the Northeast US to see expensive cars?

I'm planning a road trip throughout the northeast, starting in PA and going to probably Massachusetts or Maine. Where can I stop along the way to see cool/expensive cars? First thing I had in mind was Miller Motorcars. I know CT is apparently a gold mine for supercars/hypercars, where can I go to see them? Do people like @bc and @sparky1888 have any of their cars out anywhere usually? Thanks for any info via /r/cars http://ift.tt/2u50UTa