I'm a hd598 owner and have been burning them in for 6 months. They are my first decent headphones purchased, although they have many pro's for that price range, they are not for me. I hardily like to put them on my head anymore purely down to them being so.. Laid back. I need more base and excitement in my life. So I'm upping my price range and currently looking at around the beyerdynamic t90 price range. I currently have an O2 amp but I've heard this is a very neutral amp? So should I look for something else if I want a more exciting sound? I also have a titanium HD sound card. I like listening to all genres of music. I'm not a bass head but I certainly need more than the hd598's. I need a good soundstage for gaming/movies. I'm willing to lose some of the detail you get from the 598s to have a more fun headphone as I'm not a competitive gamer. Any help will be greatly appreciated!!