I am going to my nearest store next week. But I must choose between a keepall 45 (with or without strap) or a Sirius 45 ? I like both the bags. Does anybody have a picture of the sirius 45 (opened with maybe some stuff in, like a pochette acc to compare the size? I am doing this because I have no clue about the size of this siris. I allready have a keepall 50 but it's too big for me (I don't travel much and I like travelling minimalistic. Thanks guys! Love ya!