Hi everyone! This is my first post here and let me just say I've enjoyed reading your posts, and I'm learning a lot about bags too...so thanks! So for my first major purchase, I am deciding between a Kooba Sienna (or Carla) and this Bulga bag (picture). Can you tell me if Bulga is a good quality brand? Which one do you think I should buy (i.e. worth it for the money)? I'm staying within $600 budget only. Thanks much!