Am thinking of having some for my birthday. I know I want wireless, and rechargeable, but other than that - don't know what to look for. What's good? How do they actually work (as in do I plug something into my headphone jack and then the magic happens - would the headphone jack be sufficient for super qualtiy sound, or would the 'jack in the back' of the pc be better: or do I have to tune them to fm like the car thingy... in which case how would it work with my pc?) Any/all advice appreciated. Is it a general rule that the more expensive they are, the better they are? What is a good brand?