I've been religiously checking bestbuy.com to see when the Klipsch subs
would be on sale, and I found that today.
The SW-350 is $169 and the SW-450 is $269.
I don't post much here, so I apologize if this isn't helpful or there's no
interest. I've heard both subs and was pretty impressed. I'm going with
the 8 inch.
SW-350:
Link: http://www.bestbuy.com/site/Klipsch - 8" 350W Powered Subwoofer/9502629.p?id=1218115621097&skuId=9502629&st=klipsch sub&cp=1&lp=1
SW-450:
Link: http://www.bestbuy.com/site/Klipsch - 10" 450W Powered Subwoofer/9502488.p?id=1218115619909&skuId=9502488