MB vs MBP
No doubt the MBP makes a smart-looking office computer and, in an office, neither heat nor dings should be big issues.
For the more mobile MB (especially the premium Black MB), I hope Jonathan Ives is looking at new devices, like the LG KF750 Secret mobile-phone, which use carbon fibre.
Carbon fibre looks smart, and should wear nicely like on race-cars; they still look good after a few scruffles. Light and very strong, too.