Headphone: Sennheiser HD518 (impedence: 50 Ω) Main use: 16bit FLAC, gaming (on laptop) Been using the HD518 for years on built-in laptop headphone jack. Since using a Powerlink adapter, there has been some noticeable fizzy noise on my headphones when I'm gaming and listening to music which is intolerable. I suspect the "sound card"/built-in headphone jack in my new laptop is piss poor and am looking to delve into an external soundcard/DAC. Products I am looking at: Fiio E10K, Creative Sound BlasterX G1, Creative SoundBlaster PLAY! 3 I'm leaning towards Creative despite the E10K's reputation. Would love to hear your suggestions.