Wear the velvet jacket with a black bowtie. And black trousers. Perfect cocktail attire, and you won't feel underdressed if others are wearing tuxes.
I love velvet jackets for evenings.
Looks to me like your shoulders are too broad for this shirt, which is causing the V wrinkle. Problem with many slim fit shirts is that the slimming is done primarily (or completely) by narrowing the entire torso (keeping more or less vertical sides). Many people who want a more shaped fit want a shirt that TAPERS more than standard (in a jacket we would call this a 'drop', as the difference between chest and waist measurements). The result is that when you find a shirt that fits the shoulders the waist is still too wide (can be corrected by a tailor) or that when you find a shirt that fits in the waist, the shoulders are too narrow (which really isn't reasonably fixable).