Jeez, I didn't even know there were so many producers of things like that! I'd love to hear what high-quality speakers would do for my music but I don't know if I'd want to move back to my normal speakers again
Cerwin-Vega!'s are awesome because, like the company's slogan says, they're the LOUD speaker company. But if you want real top line, high quality stuff, then you want something like a Bose or a Harmon/Kardon setup (if you're willing to spend HUGE $$$$)
Hmmm I dunno, I buy by what sounds good to me, not brand name loyalty. At the same point I will only buy a brand that has a good backing to it (not some unheard of inexpensive crap). I have always like Pioneer head units in my car (I've had 3...1 was an old one that was given to me for free, then I bought a new Pioneer that was more basic in some ways, but better in others...that got stolen so I got the one I have now...DEH-P4800MP)...for home speakers I'm a fan of Klipsch...I like the way they sound. I've got the promedia 2.0's on my computer and the quintets for my home theatre and they're both awesome sets...other than that I could care less as long as I like what I hear.