Hi and welcome, I am new as well, and by no means an expert! I asked the same question here, too. I bought a city for my first bbag b/c it seemed like a great option size wise, plus it can be wor several ways, including having a strap. That being said, I have just ordered a GH part time, similar to a city, just a different shape and a slightly longer strap. So, I guess it depends roughly on your preference for a strap or not. For me, I wanted a strap, plus I really love the size and look! Good luck.