I heard recently that Allen & Heath released (without too much of a bang) an updated version of their Xone:92 DJ mixer. This mixer is one of the greatest and the Xone sound is so, so great. One night in a club, I remember Objekt starting his set on a Xone mixer while the previous DJs were playing on a Pioneer mixer. That sound difference was crazy. While Pioneer's sound was all flat and crispy, the Xone sound was punchy, breathy, and lively. 

The MK2 apparently solves some issues the original one had around noisy filter activation. The Xone:92 had some issues: activating the filter is now clickless. 

I am pretty tempted to replace my very old Rane TTM56s.