Yeah, on the other hand, if you can find a way to get very tall bars, I'm wondering if there's a wider range of sizes that would work if you go small. Like maybe the fact that you're sitting back and upright moves your knees back and you'll want to have your pedals less far forward relative to your seat to still get on top of them. So maybe the trick is you want to go one size smaller and just raise the hell out of your seat/bars. Like you mention, that'd suck if you wanted to stand to climb, though. Maybe we'll get lucky and someone with actual experience will post and clear up some of my half-assed conjecture.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"