First disagreement....about witnesses

So picking location, church, venue, date and colour scheme was a walk in the park. Done within 10days of being engaged. Bridal party selected, biting my tongue ever so slightly on groomsmen but his choice.
However we seem to be at logger heads about something so trivial....witnesses. I got upset and agreed to put pin in discussion for now. However I really don't want to back down or see a way to compromise. My brothers aren't involved in anyway at moment but his family are I've said how nice it would be for them to do witnesses. However OH thinks it should be one of them then his brother in law so it's equal. I get that but then one of my brothers isn't included at all. Arghhhhh.