Some great suggestions so far! Silloth is one I can't believe I forgot! I've not yet played RWD, but that certainly seems like an intriguing green complex.
Mark, well said, and to your Ross quote, I wonder if par-5s, moreso than 3s or 4s are prone to an over-reliance on man-made hazards to create interest (ie-bunkers). I find it interesting that on this thread so far, there are more examples of courses that wouldn't be characterised as 'modern'