Maybe not my place to provide this type of advice, but if you are planning to visit an MP for the first time, I would NOT start with a duo, busty or otherwise.
Even one MPA can be a whole lot of fun.
Many busty MPA's around, and the veterans will certainly nominate their favourites because all these guys are really unselfish. Do you have preferences for ethnicity, height? What part of town will you be in?
Have you visited the Health International web site? Plush? SRM?