Hi there,   I'm a bit of a newbie at the whole headphone amp/DAC part of things, but I have a nice little home studio that I've built around an Apogee Duet 2 and I want to make sure that I'm getting the most of out of my output.  I'm currently use this setup for vocal and instrument...

Would love some opinions... I am in an a 6-person cappella (all vocal) group that performs pop and rock tunes, and we recently purchased a Shure IEM setup for our live gigs. However, the stock earphones are muddy and unclear to me, and I'd like to upgrade to a set of IEM buds that would give...