I wonder if the tailor can take in back chest to help with bunching, but my fear is the chest will become too tight. I wouldn't keep this one if I were you. I wonder what the 40R would look like. It doesn't exactly hurt to try a 42 either, but I like the shoulders/waist here. I can see why you're conflicted!! Part of me wonders if sizing up for pants and wearing them slightly higher on your waist could be helpful. It's hard to tell without a front pic of pants sans jacket.