Help me choose my first GS :)

Hey everyone,

I will be heading to Tokyo at the end of April and I want to purchase my first Grand Seiko and potentially a vintage one too. I will be honest, I am completely overwhelmed by the amount of options, thus why I am asking for your recommendations. My initial thoughts where either a Shunbun or a Ginza/Wako exclusive, though I am not sure how viable the latter one is.

Thank you