I am taking back the Bleecker sig. duffle that I received today. yuck, what was I thinking!!!!!! So I'm debating on getting either the Carly Sig. in black, or the ergo sig. tote in black also. I'm thinking I want more of a shoulder bag, but could the tote be used that way too? It has to be in black!!! I'm also thinking the Large sig. carly , but I'm wondering if it'll be too big for me. Is there that much of a size difference between the sm and large?