Dude! You just got the HD 650 and you want to upgrade!? Listen to what most people are telling you and ENJOY your current set up. The HD 650 is a flippin' great headphone! Seriously...sit down right now and listen to some music with them. That's not advice, that's a prescription. If down the road you really want to try something different and/or want to work towards an "end-game" setup, then get the HD 800 and be done.