Reply to What Would Be Your Ideal Mixer ? (College Design Project)

As the title says im currently doing a college product where i have to design and justify a product. As I would like to believe iknow a fair amount about DJ'ing i chose to do a dj Mixer and need ideas on what the general populus would like to see in a mixer. For examples

Features
Software intergration
Construction
price ?

Any ideas would be great as im not trying to design "my" perfect mixer but a good mixer all round.