Ok, well while I was downtown Manhattan today working I stopped by JR World and went to test drive the HD650 and the HD598. I could tell a big difference in the build quality between the two immediately. The 650 felt more solid than the 598. I decided to try on the 598 first and it felt good with the velour ear pads I can compare it to a Corvette. I then took them off and tried on the 650 and OMG wow, there was a huge difference, it felt more like sitting in a Rolls Royce because it was so soft and plushy. I think that alone would make me buy the 650s. I know you 650 owners feel good when you put on your HPs, right? You know what I am talking about.You all probably shaking your heads yes and smiling as you read this.
Anyway, the sound seemed a lil more muffled on the 650 than the 598 and the bass was pretty good on both sets. I kept switching between the two and that is what I noticed. I do not know what source they were using, I am sure a bad one. But I don't know, the 650 felt so good. At this point I am not sure what to get so I am going to wait it out and see. Since I live in City and I am mobile a lot I might just get the Bose noise cancelling HP until xmas so I can get the 650 or 800 with a really good amp. I will be needing both anyway because that is how my lifestyle is now. But the plush feeling when putting on those 650s was like heaven, they just make your ears sink in them like there being cuddled.