Please do not understand my answer to be offensive - I just want to be honest as you asked for!
I would not buy a Nautilus at all - IMHO these sports watches are not real Pateks - they are just attempts to cover the sports watches segment in the market.
When buying a PP you should chose a real masterpiece like a world timer or a perpetual calender, ...
When you want to buy a sports watch just take one of the wide market offers - there are many nice watches for a fraction of the Nautilus´s price and even look much nicer.
IMO the whole Nautilus line is ugly.
best - Erich