Yeah. I hate the idea of buying a guitar without trying it, but I'm living in Korea right now so that's a little hard. Wish I could run out to a Guitar Center or Sam Ash right now to try out a few.
Depending on store's return policy, you could alway buy one and if you don't like it, send it back. As far as the sound of the blacktop, I think it is really cool. One of my Gibson fans (typically plays semi-hollows, Les Pauls, and some teles) liked it. He said the neck pickup sounded a lot like one of his guitars with P90's and he liked the contrast of the humbucker in the bridge.
The CP is cool if you would use the rhythm/lead switch, but I don't think I would. I have a Jaguar. I like the switch, but I don't know that I miss it on the Jazzmaster. The build quality on my Blacktop is great. Frets are smooth, the body is nicely made, switches work without static or noise, and the grub screws seem to be staying in place fine. Only thing I changed was I added straplocks. (But again, the first one I saw was trash, so there is a range.)