I would be really interested in KP, it really appeals with a nice layout and I think I've spent more time on this game on Pinmame than any other.
If BBB gets re-done I would be happy too for the spare parts to keep mine minty into the future. I suspect that they will go the similar path they did for MM with a different style of boards (which won't appeal), so while I'd go for KP I'm glad I have the IPB BBB with the original board set.
I'm guessing the price point would be higher than the MM remake for BBB as the bill of materials would probably be higher, but KP seems a little more "standard" and probably a similar price point to the MM remakes.