Anyone know of any good boot models with a spacious midfoot? I've been having issues finding a pair of boots that fit. Tried out all of the latest Scarpas and some Dalbellos but can't find any that give enough space around the middle of the foot. Tempted to try some of the BD series which I've been told are a bit more spacious (i.e. Prime, Slant, Quandrant) but it would mean ordering some in which is risky business.
You haven't mentioned custom footbeds and heat mouldable liners (eg intuition) which can sort most feet out assuming the shells are correct. If by middle of the foot you mean 6th metatarsal then a competent fitter can blow the shell.
Blah blah blah recommendations, blah, blah, blah following random advice, blah blah blah same thing I've said a million times.
Now once i've got that out of the way. Ignore everything else and go to a good bootfitter and tell him what you want. Listen to what he says and then buy what he recommends following a proper boot fitting session. Expect this to take in order of 2+ hours depending on how awkward your feet are. Everything else is irrelevant, including your sense of comfort trying them on without GOOD professional guidance.