I hear ya, shit can get confusing for just trying to find some damn skates that fit. Traditionally, Vapor was the 'Tapered' fit, Supreme was the 'Anatomical' fit and Nexus was the 'Classic' fit.
But now Bauer has that new fit system where you can get a Vapor skate (if you like the features a Vapor skate has to offer) that fits more like a traditional Supreme or Nexus (again, shit can get confusing.) More info in this link from Pure Hockey (
Bauer Performance Fit System | Pure Hockey)
My opinion is Bauer Vapors (using the normal Vapor fit) would not be comfortable or fit you well if the ones a half size down felt too narrow. If you got fitted on a Bauer machine, it should have registered what line or new Fit number would be best for you.
If Vapors felt too narrow and Nexus' felt too much room in the heel, Supreme might be the best fit for you considering it's supposed to be more anatomical. Perhaps try on some Supreme EE's or 'Fit 3' (the Supreme EE fit) in another Bauer skate if you like features of Nexus/Vapor but want the Supreme fit.
Would not recommend buying anything without trying them on and feeling comfortable first.
Also, if you're a heavier set guy, you might need a stiffer boot for more support and stability. For exmaple, the higher end skates in the Supreme line (3s Pro and 3S etc.) will be stiffer and provide mroe support than the S35 or S36's.
Hope that wasn't
too complicated and helps a little...