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Go with whatever fits your foot better.
But if you're too stubborn to do that, I'd go with the Full Tilt Seth Pro because it has a heat-moldable liner so it will likely fit you pretty decently as long as your foot is thin, and then buy a #6 flex tongue for park.
The only boots that you can make pretty much 100% into the Seth are the First Chair and Konflict. For the Konflict, you just need the 10 flex tongue and for the First Chair you just need the active boot board. All the other ones have either a little bit different liner, a wider last, a litte bit of a roomier fit, or different buckles (which probably don't make much difference anyways).