Hi enlo,
若這是你第一只中價自動表,我會提議Rolex. I believe no one including yourself will regret. Rolex is a Rolex. You have thousands of reasons to love a Rolex. But if you have already a few automatics, I will suggest you go for the GS. I do think that every watch lover should have a GS. This is what "onlyseiko" said- GS的手工打磨和組裝, 報時的精確性, 完全優於端士的標準. You have to have one before you can appreciate all these.
Cheers,
KH Chiu