i have the bigger version of these the 850 watt pmpo's these are some fine speakers!!! I've had these for about 2 years now, and I have had only one problem with them, and thats a small buzzing moise every once in a while in the subwoofer, but I think that is even caused by some of the wireless signals i have on my computer.... I got the 850's for 30 bucks of ebay, I would check there too, but if you want some cheap speakers boka makes the best generic
-TH