looking at BeyerDynamic DT 770 PRO 80 Ohm and a modmic now after reading the threads, ive got as ive said the razer kraken 7.1 usb surround, and there so uncomfortable, my soundcard has a amp built in which has a seperate power source from the psu, but not sure to get the 80 or 250 ohms, will be used for 70% game and 30% music and teamspeak, the motherboard says it can power upto 6oo ohms i think.