A Choice of Audio Interfaces | Your Advice Needed

Hi again, everyone.

I hope to purchase an Audio Interface soon. I have narrowed my choice down to the following devices:

[#]Native Instruments Komplete Audio 6 (KA6)

[#]M-Audio Super DAC

[#]FocusRite Scarett 6i6

[#]Behringer U-Phoria UMC204HD

[#]NuPrime uDSD

If you are the owner of one of these devices, please share your experience of it with me. Pros? Cons? I am particularly interested in the Komplete Audio 6 and the new M-Audio Super DAC.

Thank you.