The Jaben offers is really good. I ordered the TH600 from Price of Japan coz previously Jaben were selling them for more than S$1.6k.
At S$999, with local warranty to hoot, it's a jolly good offer mate.
Bare in mind that the TH600 is using 6.5mm plug and the cable is 3m, so you'll need a 6.5 to 3.5 adaptor and coil the cable really small if you want to use it with your smartphone.
Anyway, I've tried plugging the TH600 to iP5 and Sansa Clip+. While they are very easy to drive, give them a good source of clean power and they will excel.
Not sure on the headphone out of AVR, as I'm using the TH600 with iFi iCAN, which is a budget amp with a small footprint.
With my current setup of MBP > AudioEngine D1 > iFi iCAN, the TH600 gives me more satisfaction than the Senn HD800.
I've a WA7 Fireflies on order, so hopefully it will even up the playing field between the 2 phones.
Whether the TH600 is worth selling the SE846, tough decision you have to make
Thanks for the reply! I am more curious on it being powered by a Denon Receiver, as that would most probably be my home rig. Anybody used them with a receiver before?