My Omega has an all metal SS band...it is awesome BUT for the recent treasure from Sir Musgrave the Seiko needs an NATO strap like this:
http://www.corvuswatch.com/images/cord1.jpg
Currently I have an Maratac NATO strap in olive drab which is very understated and appropriate for the watch:
http://www.broadarrow.net/zulu.jpg
At < $20 a pop you can't go too crazy ;)