The only reason I am leaning towards the Bose is because I can actually hear them at a store and buy the extended warranty from Best Buy.
Why would you buy the extended warranty from Best Buy? You pay for 5 years and only get 4. The warranty won't be used until the product you purchased has gone past it's factory warranty and the Best Buy warranty starts from day one. Total waste of money. If you're afraid of the product crapping out in a short time why would you buy it?
If you
must buy Bose, buy it used. Go find it on
craigslist or just buy the speakers on craigslist. They're all over the place with a wide range of pricing.
Depending on the size of your room will greatly affect how they sound. The system in question is probably only useful in a 10x10x10 room. It'll never fill anything louder with decent sound. Remember, Bose always touts their product as having superior sound to the "factory TV speakers" in their commercials (very careful marketing scam). Your current system, whatever it is, will probably blow the Blose away.
Go get some decent bookshelf speakers that are smaller and a real sub to go with them. It'll cost you less and you'll gain superior quality of build and response.
I've heard the Bose systems and have never liked hearing vocals coming from their "bass module". Notice that they specifically did not call it a subwoofer because it is not one. The imaging on the speakers is poor because they're designed not to image properly. Be careful of what you ask for.
Overpriced equipment with poor delivery.
This is a
quick comparison of less expensive systems with the Blose. Their should be no frequency response gaps from the satellite speakers to the bass module/subwoofer. (Yes, it's a little dated. But, probably still very valid)
-pat