Warning: Spoiler! (Click to show)
I dig the shirt and belt...a lot. I'm not feeling the suede with this fit, knowing you have a lot of cool casual leather laying about that would work a little bit better (for my tastes). Love that shirt brudduh.
If you're talking about button-up shirts (assuming you are), don't dart the shirts. If the arm holes are too low and the body is too big, have your tailor open up the seem that runs along the side and under the arm, and reduce the amount of fabric there. This will slim the sleeve, raise the arm-hole, and slim the body.