MBT-Steve,
I'd love to get other opinions, but despite posting this question in a number of ways, I can't seem to get many comments on MB's option trading.
Understanding that you are far from an unbiased opinion... at this point I'd simply take a biased, but informed one.
What are the differences between MB, IB & OX for option trading?
Speed of fills during volatile times, potential for placing complex option orders, etc, etc...