concur fully with
@robav8r. Having a command ballcap makes you part of the team. Nothing says "not from here" or "bootcamp" like not having a command cap. Theres nothing better than having a really salty command ballcap, bonus points for having one in a different color. IMO the command cap is one of the modern naval traditions. Knowing salute isn't hard (as an ENS: everyone).
Also, $20 is a hard pill to swallow? I used to spend at least $20 in new patches and nametags. Might as well add a ballcap to that bill.