The Jacobite isn't for me, but MANY men wear it very well. Go for it!
They come in alot of different colors too.
I prefer banded/collarless (1880's style) or Celtic Croft's Rustic Kilt Shirt w/ 3/4 sleeves.
For a somewhat dressier look with my US Army tartan, I wear an off-white/natural polo. I'm not a dressy guy.