travel bag opinions

i can't decide on a travel bag, im in between the stappo and the soolla tote. i mainly carry fountain pens, inks, a few midliners, my cousin, weeks, and original techo back and forth from work, my partners house, and my house. i have a few random pouches right now that i use to organize, but i like the sturdiness of the stappo and the fact its like a portable setup...but i fear it may be too small for all my supplies. but the soolla seems TOO big and like all my things will just end up thrown about in the main pocket. thoughts? its an expensive purchase so i dont want to waste money on something i'll regret...