I own a firewire Apogee Duet on a Mac Mini running the latest version of OSX Mavericks, and I'm growing weary of the audio issues that creep up. Granted, I'm guessing that upgrading to the USB Duet 2 would fix the issues - maybe - but I'm wondering if I should be looking at another device. The issues I'm experiencing are audio cutting out when more than one app is creating sound at the same time. For example, if iTunes is playing and I get an email, all sound may cut out, or I might just get a bit of digital noise. This morning, I was listening to iTunes. I paused iTunes and switched over to play a file in the finder, but I got no audio. Fine. I went back to iTunes, but that audio failed too. These problems don't happen a lot, and they usually resolve themselves quickly, but I'm growing tired of them, and since my Duet is the old firewire version, I might as well look into upgrading before Apple stops putting firewire in Mac Minis (since I'm 99% sure my next Mac will also be a Mini. I'm really happy with Minis - I've been using them for years). Is there a D/A? converter under $500 with even better sound quality than an Apogee Duet? All I need are L/R in and L/R/ out (not including a headset jack). A headset jack is cool but not required. Thoughts?