The MacLaren and Isle of Skye are both absolutely beautiful tartans, but I'd go with the Isle of Skye because it's heavier at 16 oz. (I must admit to a prejudice against red tartans even though I wear red Robertson when in full dress.)

Nothing wrong with any of those tartans--we are all impressed!--but I would go with the Skye.

Of course, there is the question of what goes on top. You want everything to match.