Pants are a bit tight for your frame, but it could just be the angle that makes you look top heavy.
Also, for future reference, DBs look better with wider lapels than their SB counterparts, as do peak lapels to notch.
+1 on mohair. That fabric, I think, will capture a lot of what you want to convey.
+2 on the midnight blue. Meaty peak lapels or three piece.