Gentlemen, let's resolve to make the big purchase in 2-K-10....yep, we're talking about a tuxedo preferably with peak lapels (or notch will do)! It's neither stylish nor fiscally prudent to rent one for each black-tie affair.
Note: the sooner you buy it and wear it, the more quickly your cost-per-wear starts dropping... if you purchased a custom one (higher end) for $1300 - went to two black-tie affairs a year - managed to maintain your current weight for the next eight years - the cost-per-use would be a mere $81.25!!