Cheers bud, It's like I know for a fact that they're gonna sound great out of your sx1080 :D
I recently heard the arcam and the nad m51 side by side. I expected to hear a world of difference between the 2 considering that one costs 2000+. I spent around 3 hours with the 2 of them. I was surprised to find the differences were really subtle. The nad was smoother and that was about it. I was using the hd800 of course and the HDVD600 and Wa2.
I think im happy enough with the arcam. I dont fancy paying an extra 1500 for a bit more smoothness.
Thats really cool. Ignore the 5 percenters my friend. Arcam were the first to build a commercial dac back in the day, they know their schiit. ;)