You may have noticed around here a preference against the PC, which smacks a little of the RentAll shop, and probably a similar inclination against the fly plaid, for various other good reasons.

There is nothing wrong with the PC. A lot of my good friends wear the PC, but I concur with the wise counsel of my elders above. The Argyle is more versatile and much less likely to fit badly, though I expect you are not going to let your kit look wrong, whatever you choose. The best way to make sure a PC looks bad is to wear it with a bunch of rented ( or rental -grade ) accessories. Your own shirt and studs and a real tie will rescue whatever jacket you may be forced to rent. I expect if you are wearing black tie twice a year, you have already grown past the awkwardness of some people. Your Black tie kilt rig will not be a problem.

This has nothing at all to do with versatility, but I would like to put in a plug for an argyle-style jacket in navy or black velvet ( or pinwale corduroy, as others have suggested elsewhere.) Not only is it correct, it is elegant and it will give admirers a reason to rub on you as they gaze at your kilt. Velvet blazers are all over the marketplace at this moment in fashion and you can get one quite reasonably. Chop it a little bit and get out your cromach to keep the fondlers at bay.