So your not sure if you want a male or a female!!!!!!
There is a big difference between males and females,
Males are bigger and more impressive looking, while females are smarter, easier to train and they are more protective of their family. Males are like big puppies their whole life and females mature much faster.
Most people want bigger and more impressive looking not realizing that a female is the better option for the reasons I stated above.
If you have a busy life and need easy, a female is the best choice however, if you work from home then it may not matter to you.
Remember, it's not as much about the look as it is the companionship you get from a Rhodesian Ridgeback, both males and female are an impressive looking animals.