I think a good idea in order to keep your closet curated and not jump on every impulse purchase you see (or closet revival in this case) is to constantly ask yourself 'where would I wear this.'
If you have particular events in mind you can match the outfit to the occasion, otherwise you'll have a closet full of things which might have (had) appeal but no utility.
It's fine to have a dinner suit for formal occasions, and maybe a light colored linen suit for beach side weddings, each of which you might only use once or twice a year. If you have unlimited space and funds, go for it. If not, use the above mantra to gauge the necessity and utility of anything.
If you decide to get rid, PM PT Williams, this kind of thing. Is right up his alley.