Sorry but the sound is subjective thing is plain rubbish.
Everybody these days deems themselfs an expert but in fact not 10% of buyers can actually hear differences in qualitiy or fidelity outside of plain noticable distortion or other phenomenances.
And in general thisd is not a shortcoming (your ears are your ears) but what is is the commerciality of products (well known brands ect) or the bad friend/families advice or the salespeech.
So indeed the best thing to do if you have the money and/or high audio demands is to go listen (with some own CD/DVD's) to everything out on the market instead of buying the mainstream or the cheap solution.
Thus the trick is to buy as best as you can get for your money.
And brands like Bose, JBL, Sony, Pioneer,.. seems to be on the first look doing good but compared with for example with Beyma, Pol, Klipsch, Focal or similar brands they perform poor. And mostly just for a few 10 or 100 bucks or euros more.
And what the PC speakers are concerned: best price/quality today is indeed creative X-fidelity SB and logitech/Creative/harman kardon 5.1 or 7.1 sets.