I really like all 3 of these. Would like to see a lighter font, that has slightly more style. I like the san serif modern fonts, but this one isn't interesting enough. It's also a bit heavy, next to the emblem.
I would like to see #158 with a lighter serif font - something elegant, and classic looking, that is less heavy. Also, can you try a version with no gradient on the outside of the diamond, and the gradient only on the inside diamond? Conbine the outside of #151, and the inside diamond of #158.