I have a Blue Sumo from a late Seiko collector in Canada. The Sumo is by far the most well made Seiko auto at this price range in my view. Since then I have always kept a lookout for the classic black version.
Chuck from Taiwan happened to be selling one seemingly "catch-n-release" mint black one in full bracelet and I thought I should just get it (even though my new guideline is not to have repeat model of different color!).
Swop the bracelet to an Oris-inspired depoyant black rubber.
The black is simply stunning, very sporty compared to the elegant blue...