Xone62, it pisses all over the 500.
The problem I have with the Pioneer stuff is it feels cheap, the 500 is flimsy & the effects are pretty naff & I don't think it's as intuitive as the Allen & Heath, I've also heard a lot of stories about bits breaking off. It's the same for the CD turntables, they just don't feel as well made as the Denons, also at the moment you can pick up a Denon dirt cheap as everyone is going for the Pioneer.
All the talk about 'industry standard' is crap because anyone with half a brain fucked on ket should be able to transfer the basics which is the most important thing....