I purchased the Montsouris to use as a diaper bag, and didn't like it. I found it akward to get in and out of the bag. I would recommend the BH , although if you are carrying bottles, you would need something to protect from spills.
I found myself using my Large Noe, but I removed the drawstring. After a while I just started grabbing whatever was easiest. After many trial and errors, the Noe was the bag that I used daily. It was patina'd enough so that I didn't worry about it.
If the BH had been available when my children were babies, I think it would have worked best for me. One of the purse organizers available would really help too.
Happy shopping and congratulations!