My budget is 100$ I have a desktop, so an iternal soundcard is possible. anyway. I would like DAC and AMP recomendations. I am looking at the e09k, but I am wondering how well it handles being a DAC as well as an amp. All suggestions(except keep onboard) are welcome. My headphones are sennheiser hd558s, and I am debating on whether to mod them or not.