I am not an audio hardware expert, I have been using the Creative X-Fi Titanium HD for almost two years now and I just upgraded to a new pair of headphone, the Audio Technica ATH-M50s. The sound is good but since the Titanium doesn't have a headphone amplifier I want to hear how the M50 will sound with a dedicated amp. I have been looking and amps like FIIO E10, EO9K...(my budget is around $150 US). Any suggestions for a good amp at this price, I really like the clarity of the X-Fi Titanium and want an amp that works with it to bring the best out of the M50. So do I need an amp with line level inputs? I am guessing that with amps like the E10 with USB input only and its own DAC it will bypass my sound card, am I right or wrong?