Reply to k2, z2

Hello,

I'm looking for a compact all in one controller to replace my s4. Allen and Heath k2 or the new traktor z2 are options. I'm concerned about the 16 bit soundcard on the allen and heath. Is the audio quality lower than that of a 24 bit soundcard like the one built in to the S4?

Also would you consider the Z2 to be portable and can it be used to control Traktor without using a f1 or x1?

Please help me pick the right controller. Although I love the S4 I've had issues with its size and reliability. I don't need jog wheels and need something portable.

Thanks