I use the ODAC/O2 with the MD and have never heard them better. In this hobby we will always be surprised and want the "NEW AND FABULOUS SO CHEAP GO BUY NOW" amp or dac. The ODAC/O2 is more than enough to drive orthos (I also use the HE500 with the combo).
So unless you want to:
-Want to pay more to have better aesthetics (looks)
-Want other options (inputs, preamp etc...)
...the ODAC/O2 will be more than enough.
Think about it, no one have heard this yet, and already you want this over the ODAC/O2? Don't let the hype get to you, calm down and enjoy one of the best sounds for the price combo there is:
Mad Dog driven by ODAC/O2.
Disclaimer: This is all of course IMHO. I am sure the new schiit gear will sound fantastic, but don't jump on the hypetrain before knowing where you are and where it will take you.
Edited by BleaK - 12/13/12 at 12:00pm