I would deffinately wait. That first buck is nice but golly, bucks like aren't rare. The 2nd buck is a buck of a lifetime, and most people would be lucky to even seen one that big.

I was in the relative same situation once. I once past up a 150 class droptine buck with my bow, for a bigger typical behind him. The bigger then turned and went another way, and I went home empty handed. But a week later, I killed that droptine with my rifle, so it all worked out.