Hi aworld,
Crossover settings will vary based on personal taste; I believe the speaker manufacturer and the specs for the speakers will give you a better idea of where they should be set, but their recommended setting still may not sound good to you.
I would recommend setting it to your personal tastes; after all, you are the person who will be listening to them the most, so they should be set the way you like!
If you want to have a shop look at the settings and/or do some tweaking for you, I would recommend you use our dealer search and find the closest dealer to you, then go to the shop or give them a call to see if they can help you out.
I hope this helps!
All the best,
Moe