honestly, you dont get much stronger than 36hole, 3 cross, box rims.
sure deep v's are strong but theyre also heavy and in many cases more expensive. for what? colors?
i think it all depends on what kind of frame you have.
old track or road frames with skinny tubing look best with box rims.
the more modern, fatter tubing of steel and especially aluminum track frames these days seem to go better with the deep look.
IMO