Puffer offers a couple of good options.

Maybe you would like an older style blue bonnet, something like this. It's Mac Newsome wearing a period outfit with blue bonnet:



Go here to see some closeup examples of the bonnets. Scroll to the bottom where the Historic Styles section begins.
http://giftshop.scottishtartans.org/bonnets.htm

For regular wear, stick with a balmoral.