The slope (camber) on the decks is a non issue... in fact it makes seating and movement more comfortable and easier while heeled (and the boat is meant to be heeled)
As to your other 'choices', probably all reasonable boats but to be looking at moderate designs like the Mirages, AND a Hotfoot 27 AND/OR a Cape Cod Catboat means that you really aren't sure what kind of boat you want. These are hugely disparate designs in terms of accomodation and performance and is like comparing apples to wingnuts.
I think you need to take a step back and try to refine and define just the type of boat you really want/need. Then start shopping similar types rather than this wide range of different boats. Best thing to do would be to hang around marinas and yachtclubs and try to get rides on some different boats so you have some idea of how they feel, handle, and behave.
Don't rush into anything until you've sorted that out for yourself......
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)