So I got the AKG240 MKII last night. I listened to them for a few hours on my PC. I had them hooked up basically through my sound blaster going through a Monsoon setup which has a headphone jack connection. I also listened to them on my Ipod.

They were much more comfortable than my old sennheiser hd 212. I have to say though that my hearing must not be too refined. I could not really tell a huge difference between the two headphones. Either my ears are the bottleneck here or my setup considering I am not using an amp. The source was a mix of 320bit mp3 and cd listening.

PeachTree 65se, PeachTree D5 and SVS SB1000 - Stereo
M80s, M22s, SVS PB3000