Little suggestion for the Collies: Why not a blue (and/or) red merle collie?
They seem pretty popular, especially the blue merles. Also, here's a few other dog suggestions: Tibetan mastiff, Czechoslovakian Wolfdog, Canaan dog, and Karelian Bear dog? ^w^ They seem not very 'popular', but they seem like cool dogs.
(Extra Suggestions: Kai Ken, Chihuahua, Beagle, Shiba Inu, and Akita Inu?) Sorry for suggesting so many dogs. I just love every dog breed there is. cx