Woohoo, AD upgrade city! Dan, I just dropped my Mad Dogs at the Post Office, and you should have 'em on Friday.
I went for the XLR cable option since I'll eventually be using it with a Geek Pulse X... but in the meantime, I'll need to go make myself an XLR -> TRS adapter... and an XLR -> Banana Plugs (for the Mini-X I just got).
Since we're going to have the same setup I'm super curious how yours turns out. I'm either going to make my XLR -> TRS adapter with some of the stock cable from the HD650 or pick up some Mogami star quad and cover it in paracord. On a related note it would be wonderful if there was a MrSpeakers adapter made available on their webpage for those who don't DIY.