Batgnolles Horizontal or Montrogueil???

BH. I don't think the Monty looks modern at all, it's just a newer model.
The BH is a classic and the shape doesn't go out of date.
The shape of the Monty is a bit ball-like when it's empty and it sags big time when it's full. My grandma nearly bought one but didn't like it anymore once she put in all of her stuff in the shop. She got a Speedy B in the end.

You also need to keep in mind that the gold plaque will get very scratched and that the colour will probably rub off rather soon.
 
Monty! I love mine, it fits so much! I think the BH looks a bit dated. The Monty has those cute pleats and the zip top which is a must have for me anyway. It doesn't sag as much as the Speedy and its only half full as I don't carry alot. Try both on if you get the chance. Good luck!