I'd be grateful for some advice. I'm having a dinner jacket made for me with the following specs: single breasted, single link button, midnight blue super 120 (my tailor has a limited choice and I'm in a bit of a hurry), black velvet shawl collar. Should the trousers have a velvet side stripe that matches the collar - or a braid side stripe or satin/grosgrain? I think I may have to wear a cummerbund or my waistband will show - in which case, should the cummerbund be...