This arguement crops up in all topics discussed I think
On a scene that is basically based purely on records, then if the DJ can't use these in their original format then IMO he (or she) shouldn't be up there. The are many out there who can do it properly and would do so given the chance.
Anyone can DJ with cds, audio files etc and I don't tend to go dashing to the decks to see if its genuine or not, but I want to see and hear those who do it properly.