I haven't tried the Siberia, but if the 3H is anything to judge by, you are in for a treat. As a thought, the Rosewill RHM-556 headset ($15 @Newegg) appears very similar in dimension, shape, and specifications to the 3H...maybe a gamble, but surely one worth having something you could give to a friend.
3H has excellent performance, good bass down to about 50hz, and it sounds wonderfully distortion free at almost top volume. The highs are quite crisp and clean, though they are kinda rolled-off. It sounds the teensiest bit fuzzy, and I do mean teensiest. It has mildly better highs than the AKG K27i's, but the latter has better bass. The mic is alright, and the cable is a thick one, with heavy duty jacks at the end.
They are kinda small, more covering your ear than enveloping it, but you get used to it. Unfortunately, you can't bend them very much, as they have a sensative joint at the top.