actually, there's nothing inherently wrong with some of those types of speakers. sony, jvc, yamaha, pioneer and other brands that offered better consumer products sold some mass market speakers that were truly very good, held back not in sound but in longevity due to poor quality cabinetry that gradually falls apart with age, excessive cabinet vibration or even rattling in some speakers as they aged but didn't appear for a few years, and also generally poor vinyl finish. I've heard crap and excellent performance from speakers that were included in component stereos (separate receiver, turntable, tape deck, speakers, all in separate boxes, but basically intended by the manufacturer and store to be sold as a package, so kind of like the ultimate in what amounts to prepackaged stereos, just in different packages that in theory the person could mix and match.
in the 80s you went to future shop or a&b sound or the smaller chains with some truly higher end gear as well for sale, and you said you had $600 to $800 for a full stereo, and they said ok here's this jvc system, it even had jvc speakers, or technics or pioneer, again all the same brand for everything, even with mysteriously similar model numbers (801 receiver, 805 speakers, 802 cassette deck, 808 turntable, whatever).
if the company was capable of making good speakers, then in the nicer combos you did sometimes get some quite well engineered speakers with good drivers in a computer designed cabinet with good crossover points chosen and lpads so the designer didn't have to worry about exact driver level matching or anything
I'm NOT saying that they have the amazing imaging of great speakers designed for that purpose, or really low thd, or really flat response, or really great dispersion control, or anything other than basic first order crossovers (sometimes without even a choke on the woofer (although never forget that a woofer inherently has a built in choke due to it's own coil and sometimes people actually design that into the crossover curve)).
but they CAN sound really really good. I've heard speakers from polk, infinity, jbl, kef, tannoy and others that had very serious design issues resulting in terrible balance, evenness, phase problems, peakiness or dispersion problems, and I've heard great speakers from jbl, sony, yamaha, pioneer and others that didn't have any of those issues at all and generally sounded better.
I fully admit that it's RARE - most consumer crap is just that, crap. and most speakers from dedicated speaker companies are great. but the companies that did a little of everything (the sonys of the world) had some brilliant engineers that could make some truly competive great sounding and measuring speakers (there's a sony bookshelf I can think of right away that is excellent).
All that being said - I absolutely despise sony and yamaha 5.1 systems. I've heard the nicer mini+subs from both companies and simply can't believe the terrible boxy sound from those satelites, some nasty midbass and higher resonances that are inexcusable in speaker design.
anyway, yea, enjoy those sonys if you like them. nothing to be ashamed of.
but as others have said, when you get something better, it'll be interesting to find out what you feel about the sonys when you're used to more accurate speakers. unless those sonys are particularly good ones that I've been talking about having been released every once in a while through history!
as always, imho and from my personal experience, by no means am I saying that anything I wrote is correct, accurate, or anything but just my own ideas.
cheers,
Don
Of course, knowing what they're doing can mean they know when to call in an expert. 
