Site Upgrade

I’m looking to change the layout and look of the site. The page buttons across are too cluttered and dont look right with sub pages beneath them. The picture of the wheel is going to go too with seasonal photo in its place instead. I’m open to sugestions as to what wordpress theme would look better.

Update: there have been a few minor changes that have improved things , the only problem I have now is the WordPress editor is still set to the old page width.