While the red tartans do look smashing, probably one of the best tartan suits I've seen is that worn by McKerrill of Hillhouse. Sandy, can you post a picture?

In tailoring, as in life, you get what you pay for. As big a fan as I am of Stewart Christie, I'll probably bite the bullet (a dum-dum, I'm sure) and opt for M&M in London when I can't hold off the tartan doublet & waistcoat impulse any longer.