Rating: Summary: Not bad if you can get it cheap.. Review: For a small speaker, at well under two hundred dollars (I'd say closer to one hundred dollars would be a fair price) these Polks outperforms larger speakers in the same price range. I would look on eBay for the best deals.
Weirdly enough, the R20s which you'd think would be better given its higher model number, actually sound much worse than these---the R15 has a better tweeter which means better mids and highs.
Of course you wouldn't ever want to use these are your two front mains unless you were using it mainly for home theatre and/or low and moderate volume listening, and also had a powered subwoofer to deliver the bass. They would probably do just fine as surround speakers, though.
Now if you were looking for really good quality small speakers I'd recommend Ascend Acoustics CBM-170s or Paradigm Mini-Monitors, the Ascends are availabe only online direct and cost up to three times as much but if you read their reviews on audioreviews dot com you'll see why.
Rating: Summary: Nice Little Speaker Review: To begin, this speaker did not blow me away the second I hooked it up or anything. But it does put out nice warm sound you would expect from polk. It was definitely worth the money. Polks sound nice with Onkyo receivers (I dont know why, they just do). I highly recommend these to any non-audiophilic person out there who still enjoys good clean sound from a small cabinet that wont hinder your rooms aethetics.