hongasI suggest getting a nice DAC/AMP to pair with your HE-350. You will find that the HE-350 has a lot more detail and definition especially with the mids and the highs, especially when compared to on-board audio. Maybe something with bass boost though, if you are missing that low-end ;)
hydroforgeI'm using a Fiio Olympus 2 and normally I leave Bass Boost off, but with the HE-350 it goes a long way to make listening a much nicer experience. Still finding them a little too fatiguing though.