For me, whether automatic, spring drive or quartz tuna, whether darth tuna, golgo tuna or emperor tuna, whether ceramic, pvd steel or titanium shroud, whether steel or titanium case, whether 300m WR or 1000m WR - it doesn't really matter. The design of this classic is worth the price of admission. Obviously you pay more for more exotic materials and better movement. The quartz movement 7c46 though is no slouch and is utterly suited to the prospex range.