A couple of tips to look sharp and avoid growing tired of your suits (this is my personal preference so you might think otherwise):
- Don't get suits with stripes - you grow tired of them quickly and they are easily recognizable so you might not feel comfortable wearing them two days in a row and they are somewhat harder to combine. Get two to four (depending on how much you want to spend) plain suits of these colors: gray, brown, dark blue or black.
- Get light colored shirts - easier to combine and look great with the darker suits. White, light blue, light pink, light yellow, whatever.
- Get a few ties - same colors as the shirts but not as pale (darker or more vivid, either is fine).
Now you can combine practically any of your suits with any shirt, put on the matching tie (or a contrasting one if you feel adventurous) and you're set.
I wish someone had given me all this advice a few years ago, I would have saved a ton of money in awful suits and shirts.