Apogee Mic 96k (iOS & Mac version - incl. lightning cable)

Just plug and play, no doubt it's a bit expensive but the mic is worth every penny. The audio digital converter as many Apogee products is fantastic. I do suggest to download the Tascam PcmRecMKII app or Apogee MetaRecorder.
My only complain is that the USB cable is only 0.5m I wich it comes with a 3 or 5 meter cable.

Very easy to set up, and the fact that you can use it with your ipad/iphone makes it very useful! Very good sound quality!