depends what level you are going to...

CLEANING the car is different from your wax & polish options... and the further you go down this route the further your car colours and paint hardness and depth come into play...
so... what level are you going to... just a clean... or are you going down the 'detail' route and spending lots on colour specific waxes etc?
if it is just a 'clean' then the colour isn't really all that important
suggest you read through the FAQ section and then come back... I guarantee the majority of the answers to the the questions you will have will be in there