I'm on the same boat as you and as of now I'm leaning towards the DT880's. The reason being mainly for the comfort that I liked from my previous headphones (DT770) and they are known for their very good mids. What turned me off about the AKG's was the bumpy headband and the huge earpads that some people find irritating but from what I hear they are good for gaming and classical music. They also have a detachable cable.
As for the Pro vs Premiums the Pro's have a tighter clamp which people claim you can loosen up over time and they come with a coiled cable. The Premiums on the other hand have a looser clamp and straight cable with different aesthetics. From what I have read the 250 vs 600 ohm sound difference is debatable but I personally want the 250's for the ease of driving and the price difference.
Thank you for your input! This is a tough choice indeed. So the DT's excell at mids, and akg might have better sound stage?
I'm also noticing a lot of people saying the AKG needs to be plugged into a good amp ect.. to get the great quality sound. Will my Asus XOnar DX audio card not suffice? I wonder if Beyers would be better because of this?
I only wish major retailers near me had these brand so I could see for myself.
Edited by clemxii - 1/14/13 at 11:19pm