Personally I don't think clubs should ever have a need for a 3rd kit. Bearing in mind a lot of kids want all the jerseys and these Nike ones are gonna cost a lot, it should be very rare that a different shirt is needed. Surely you'd just end up wearing the 3rd shirt all the time, and the white...
Isn't the point of an away shirt to NOT be in the colours of the club, so that it doesn't clash with other teams who have the same colours? Correct me if wrong.