I do love the Rolex look and have one on order. But I'm totally into watches now. I use to be into LVs but got tired of them. I like to dream for which my second nice watch should be since I'm getting the midisize jubilee with no diamonds in stainless. I wonder is it best to have something different but I never tried on the J12 and don't know the price range. Even if I love it, I don't know if I can justify another watch. Perhaps if it held value, it would make it a little easier.
Definitely go to a few jewelers and try different sizes, shapes and brands. If you are really into watches, you know that Rolex is the classic choice for many, but it's not the only good watch out there. Try on the J12! Sometimes when you see a watch on your arm, it has a completely different look and feel than pictures. Sometimes its too heavy or diggs into your hand. And sometimes you fall in love!
I've found that after spending a few months shopping for my first major watch, the more comfortable I felt with the purchase.
Good luck!