Wedding Shop - Santiago

Does anyone have any recomendations for shops in Santiago for men's wedding suits? Any ideas on the price range for this type of thing in the Dominican Republic?

Not necessarily a tux but a smart suit. The male side of my wedding party is made up of english and dominican men. We'd them all in matching suits so thought it would be easier for my father to go shopping with the others once he arrives here.

Thinking now the easiest option is just to give them a colour and hope they'll blend in. Thanks for the replies though.