Where can I buy replacement home theater speakers?

Bestbuy

Any good audio store, not Best Buy. There is not really a compatibility issue with speakers, unless you have a system in a box, then it might be brand specific. That said, speakers don't generally go bad on their own. They get fried by turning the volume up higher than the receiver can handle, and the distortion produced by the amplifier burns the voice coil in the speakers. Hence the "blown" speaker. So, what you did to your speakers will happen again unless you are more careful, and/or get a better receiver, one that supplies more current. (Watts are meaningless, ask a good audio guy in a high end store about that one) The guy above mentioned speaker wattage ratings. That's meaningless too. Speakers are passive, they don't have watts.

I recommend going to your local Audio Video Dealer, NOT at your local Big Box store. I suggest getting 2 nice new Front speakers. Tell the dealer your situation, size of room etc... You'll be happy you did. Speakers that come in HTiBs are entry level speakers. I recommend looking into PSB speakers, as they typically have the best Price/Quality value... and go from there. Sadly people these days are buying great TVs, but are neglecting the other Half of the Home Theatre Experience. Once you get your two new front speakers, you'll love the difference so much, you'll like upgrade your surrounds too later on. Some people take a few years to buy all their gear, but once you have everything, you generally never need to upgrade again... aside from the Receiver, which depending on what level of unit you buy the longer they'll keep up with current technologies. I suggest you take some time and look though some AV sites. this one here is a good place to start http://www.hometheatermag.com/buyersguides/speakers/

Personally, I think Best Buy, I always see there adds on sunday. They have alot of great TV's and that sort of stuff. And I definetlly think they have speakers.