I wanted to update this topic and thank everyone for the feedback, which basically stopped me from buying the Hammer bag. I finally saw one last night in league. It was fairly clean and wasn't that old, but the threads were coming off in every direction and it looked like it had been thru the proverbial wringer multiple times. I've never seen so many loose threads on a bowling bag, I would have never believed it.
Not quite ready to advertise 900Global yet, but I'm getting close. Sounds all around like a pretty good product.