Congrats, my friend. Great news. I'll be a father in the next couple of weeks (assuming the little dude cooperates). Exciting stuff.
A Padron Anniversary Series is perfect, to my mind. My recommendation is the 1926 #1. Smoke a long, luxurious cigar. Savor the moment for a couple of hours. I think you can't go wrong with a big Padron Anniv. cigar, frankly.
An Opux X Double Corona, if you can get your hands on one, would also be damn good. But second to the 1926 Padron #1, in my book.
Best wishes.
John