I think I've decided on a zippy wallet, but am stuck on which material to buy it in. I tend to be a little rough on my wallets, and want this one to last for a little while. Would canvas (monogram or damier) be the best choice? What about epi, vernis, or suhali? I really like the vernis in pomme d'amour or the suhali, but am worried that these two are too fragile.