Well, personally I just need a dac for a computer being a source. I have no intention of hooking up any other components like a CD player, receiver, or anything else some audiophiles may want to hook up. I am starting to enjoy this hobby, but I'm trying to make it as basic as possible, using one of my macs. I don't want to pay for any extra features that some quality dacs may have, all i need is a good quality usb dac. I only mentioned the Music Streamer II+ because I've seen a few members on here use it for the Lyr and it seems to work very well with macs, and being as basic as they come. I know Schiit may be in the process of making a dac but we have no idea how long it may take.
Don't get me wrong, I only been involved in this for a few months and I am content with the set up i have now, but I know I will want to eventually upgrade and use my current set up as a back up or bring it to work, I'll figure that out later. I like the e7/e9 combo, but I love the e9 more. The first thing I would upgrade in my current set up would be the e7.
If others can offer more choices/opinions please chime in.