Diaper bags

I’m looking at diaper bags and I know I want a backpack style bag. I would also prefer for it not to look too childish, more of a stylish bag. The problem I’m finding is that all the bags I tend to like are fairly expensive. I’m going to be putting it on my registry and I don’t want to upset people by the price if that makes sense (knowing that if we don’t get it I would just buy it) the ones I’ve liked range from $140 to $200 plus tax and my mom was shocked at the prices of them.

My question is roughly how much did you/or would you spend on a diaper bag knowing you will be using it everyday for the next few years? And do you have any suggestions on bags?