I have Purple Haze to use on Black, to be honest the colour changed ness is marketing b****cks (Dodo pretty much admitted it to me on DW when I commented on the Purple Haze being like Colour Magic) - it makes bugger all difference.
I was buying again get the generic ones - Rain Forest Rub or Hard Candy depending if you want a hard or soft wax. The soft ones being much easier to use. Anyone that owns all the versions for various colours are a marketeers dream !!!
The Lime Prime is ok, no nicer than other Pre Wax Cleaners out there and is abrasive so bear than in mind.
The DW Dodo double wax is bloody nice just about to do a write up of my findings yesterday -
http://www.richtreen.co.uk/images/dw/