Philips SHE 3590BK are different specially considering the source you are going to use with them. B/c of there small drivers & small size they will slide right in ur ear tunnel with a suitable tips S,M,L Which ever suits you the best most of out side noise will also get cancelled. With it you XM should be able to produce enuf power to give you suitable listening volume. Philips SHE 3590BK are good for more things than just been small & cheap. Which a v shaped sound signature which resembles a rock setting of an E.Q with enhanced bass & treble. It also pretty solid to E.Qing an would not roll of that easily. You can achieve should signature of other IEM comparably like SM PL 21. Look at the link it a review of Pl 21 done by ClieOS. You can find PL 21 frequency response curve in the review [REVIEW] SoundMAGIC PL21 here : *i90.photobucket.com/albums/k240/ofey_s/SoundMAGIC/PL21-06.jpg. you can copy this by poweramp & the Philips SHE 3590BK should sound more mid-bass. i will not say that the bass will go as deep as Pl 21 b/c SHE 3590BK physical structure is not made like that but the Sweet mid-bass should become prominent.Along with all these facts the best thing is that these 500 rs earphone last long better than any SM or skull candy would do. They may sound good but last short.
Here below is the link & more in-depth research (R.D) done by others.
Philips SHE3580 IEM review--how can something sound so good for $10???
harshilsharma63 & The Incinerator's Suggestion Phillips HSP 2700 would do great for Laptop.