The GST, although it's a bag that you really must try on to make sure it's comfortable. I, and many other ladies here on TPF, love the style of the GST but find it to be an uncomfortable bag to wear.
I vote for the diamond stitch!Beautiful leather and more elegant IMO!On the other hand ,have you considered getting one of the colourful reissues that are coming for Spring?this is the most classy shape and the last trend between young celebrities especially the 227 size!Good luck with your decision and keep us posted!