Facconable and Brooks Brothers are my favorites for shirts. BB doesn't have the button on the back collar. Facconable has different cuts, some of which run big to huge. Go for the "classic" and you're good. I'm not a fan of the huge collars that MR has.
The bottoms and the front rise don't change but the thigh measurement does. I'm really a 32 but 34's fit me better due to my hockey thighs. I ordered both 32's and 34's but while the 32's fit better in the waist, the 34's fit me better overall.