Hello Rasomaso. I haven't got a lot of experience with recording instruments since most of my work is voice overs and such, but after what I experienced with my behringer mixer(noise floor) I would rather go for the 2i2 / 2i4, because the build quality and clean audio. My 600 works well with the...

As a new user of  the 2i2, i would say it´s a lot better than may motherboard (Asus Gryphon Z87). and a lot better than my old behringer x802 usb. As far as I can tell,  handles my Hd 600 well. the dac is decent, the amp can handle my 600´s without noticing any distorsion in the sound. I haven´t...