And what about top tube length? That matters too.
385mm reach with a 130mm stem, plus drop bars (unless we are talking effective top tube length of 580mm or less) sounds like the sort of dimensions that would work well for me. I am 189cm tall, 190lb and 87.4cm cycling inseam. Are you sure you wouldn't feel too stretched out or uncomfortable on longer trips like this?
agree that 75° STA is absurdly steep and just unnecessary. 580mm stack sounds fine, but for you, I think I'd go shorter on the stem and try to get a bit lower stack wise, unless you want the handlebars to be a bit more level with your saddle - necessary for such a long reach your LBS chose.