Is there any reason you chose the opa2107?
I just wanted to try something other than the usual opa213x.
It's on the pricey side, but the specs don't look like anything spectacular... is the sound worth the cost?
Well, I've heard people say that it's almost like a dual version of the opa627 because they are both Difet opamps. I think that's why it costs so much. As far as sound goes, my headphones are crap so I probably couldn't tell the difference between an opa2107 and a tl072.