There are many great Omegas. The sea master planet ocean of course, the sea master 300 ceramic. Speedies, the dark side of the moon eatch! Too many to list. If I were going to add just one to my personal collection it would likely be the sea master 300 ceramic chrono.
I just recently picked up this minty Omega Seamaster Planet Ocean 8500 with Orange rubber strap and I must admit I don’t want to take it off. I even slept with it on two nights, LOL. NOT KIDDING.