Damn, that was quick. I've been looking at a DAC + AMP and the retail price of the O2+ODAC was a bit hard to swallow for my wallet.
Ah well, back to searching I go.
SomeTechNoobPoke around head-fi, but I believe the O2/ODAC and/or the Schiit Magni/Modi are good as you can get in price to performance as far as I know. Fiio has some decent amp/dac combos that are cheaper and still good, and Fiio is no stranger to Massdrop. You can try googling more information for the JDS Labs cMoyBB paired with the Behringer UCA202/UCA222 as an amp and dac combo.
Sorry I am kinda just spewing words with no clear direction but I hope it helps give you some direction to look.
ZALHERAYeah, the Fiio E10K has been a great first DAC/AMP for me, and is well under 100 bucks. Has powered my HE-400 Planar Magnetic headphones quite well, and many others. I'm excited to see how much improvement I see with the ODAC+02, but I have nothing but good things to say about the E10K
Ah well, back to searching I go.