I think I have it narrowed down but the 2 I'm looking at I haven't really found a good comparison. As I'm still new to this crack called head-fi, my only knowledge of anything Beyer is my MMX 300's I use for gaming. And since they are 32 ohm I run them easy through the Astro mixamp. Now I want to put a set up together for work. I would like to know what you guys think about the Denon AH-D2000 vs. the Beyer DT 770 (250)? I like the closed design to block out noise in my office and when I first got my MMX 300 I listened to music with them at work for a couple days while waiting for my mixamp to come in. My reason for comparing these two sets are 1. they are closed, 2. close enough in price, 3. I have a little experience with the Beyers based on my 300's. I will be using an amp or either. The one big question I have in the 2 sets is the AH-D2000 are 25 ohm and the DT 770's are 250 ohm. Because I will be using an amp how will that difference come into play? Are these 2 sets very comparable, or does one blow the other out of the water? Anything like that will help.