im not really sure where to put this, because im not really sure what i need. i have a pair of koss pro dj100's. which im sure arent the best. but they suit my needs. they stay at my computer 90% of the time. and for a long time i was just using the on board sound card on my motherboard. which worked. but it felt like i was missing something. so i found a asus xonar d1 sound card that i had laying around. and it sounds better. but im pretty sure i need a amp. what are my options for around $100usd? asus xonar d1: http://usa.asus.com/Multimedia/Audio_Cards/Xonar_D1/ koss pro dj100: http://www.koss.com/en/products/headphones/full_size_headphones/PRODJ100__PRODJ100_Full_Size_Headphones motherboard: http://www.gigabyte.com/products/product-page.aspx?pid=3853#sp i am also using ASUS XONAR Unified Drivers 1.61. i heard the asus drivers suck.