Assuming you are talking about the Royal Oak series and not the Royal Oak Offshore series, if you are looking for a nice ss watch I would reccomend some of the new chronos, often called 26300; if you are buying new. If you are buying used, I would suggest the 25860 series which comes in 3 different dial colours: black, blue and white. The 26300 series comes in the same colours and has the same calibre movement (correct me if I'm wrong) but also available with two and three toned dials. If you want something more exotic I would suggest checking out the rose gold chronos (25960, 26022 etc).
Would you like something more unique I would look into the LE chronos like Alinghi City of Sails (there are two different ones) or the AP Botique ones. OFf course there are others out there but here are some of the ones I like. Hope this helps!
25860
26300
25960 Rose gold
City of Sails