Well Rolex 3135 is a great movement still. However there are other movements such as Omega 8500 that will be great automatic movements for dive watches and we will see if they are as durable as Rolex 3135 in the future. In terms of ETA movements there is a mix feeling. Different watch companies calibrate ETA movements in different ratios/ways. As a result one ETA 2824 does not give the same accuracy with another ETA2824 in a different brand watch. I believe the vision of the watch company takes control of how this movement will perform. Do not really know much about Seiko movement.I would be glad to read feedback on this movement.