I am using an m1s DAC, I bought it a couple years ago for $499 at MD, it was normally $1299, so I figured I would give it a try, its actually a really nice unit..
We normally just plug in the I pad through the dock (which is a Pure unit, so it bypasses apples dac...
if you look in this picture you can see a pure dock with an ipad mounted on it, its on the table next to the clock, I have this setup in a few of my systems, it works great. Super clean...
I was going to try the Olive 1, but after reading some reviews I decided to skip it...