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I was looking for a decent pair recently that didn't cost an arm and a leg and I came across these:
http://www.bestbuy.com/site/Insignia%26%23174%3B+-+6-1/2%22+Bass-Reflex+Bookshelf+Speakers+(Pair)/7705307.p?skuId=7705307&id=1138085354138

Apparently they're cheaply made (cost-wise) with quality parts that come in speakers 2-3x the price. There's some mods available but they apparently do great by themselves. I won't go into many details but I will say that I'm sold. I'll post some info about them when mine arrive. Check out the review here:
http://www.firingsquad.com/hardware/insignia_ns_b-2111_review/

If you're seriously interested in these, there's an auction on eBay that I was watching (but no longer interested in) for brand new ones. You can possibly get them cheaper than you can at Best Buy:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190402017574

Hey those look nice, but currently I use the speakers from my piano. They are rockin.

The speakers arrived today. They seem pretty good. Larger than what I imagined. I'm not into aesthetics but these are very nice looking. Right off the bat I noticed a huge improvement over the crappy 1" drivers that are in the Logitech Z3 satelites (I replaced them with these). Unfortunately I don't think I can get a good representation of what they sound like since they are going through my Logitech Z3 wiring which probably has 50 cents worth of circuitry and I'm guessing it cuts out some of the lower frequencies and sends them to the subwoofer because there isn't much bass coming from these speakers. I didn't imagine much but I expected more than this. I'll definitely update as they will probably burn-in over time and probably sound a whole lot better once I get a dedicated amp.

now how do they compare to my 7.2 sony sound system connect via fiber optic to the computer
all in my small 3.5  X  5 metre room

No idea. Comparing 7.2 to 2.0 in terms of sound quality is close to comparing apples and oranges. Using optical doesn't say much about quality, it just says you're using an external DAC which in a lot of surround systems, you have to.