I recently got the 231 and i think it's pretty awesome but i wouldn't combine it with a suit. It's just wrong! About the rubber strap, i strongly dislike the looks of seiko rubber straps. My 231 is on khaki zulu with pvd rings. I think it makes the watch look a whole lot better. Plus, don't think the rubber strap would look good with a suit. For me the best solution would be to get the seiko diver watch you like and then get an inexpensive, good looking dress watch like the orient sun and moon Orient Sun & Moon - ETOP003W | Yeoman's Watch Review .