I have the Zoom U44, a Focusrite Scarlet 2i4 and a Behringer. The Zoom is a little more versatile in terms of ports (like it has S/PDIF Optical or Coaxial Input). The Behringer can only do up to 24/48 while the other two are 24/96. The pre-amps are all decent. But they are all USB ultimately. One with Thunderbolt to laptop is going to be pricier. What specific things are you interested in?