Since forum posts are typically all people have to go on when it comes to a product's reliability, I chose to lean the other way regarding Klipsch Sub-10/12. I agree, though, that Klipsch sells so many units that the amount of complainers on their forum might be pretty small in comparison, but there's no solid way to figure that.
I passed on the RW-12d b/c of it's dimensions being larger than any of the competitors, tax b/c NewEgg has a warehouse here, and some, not necessarily warranted, concern about amp longevity. I don't know if the exact same parts that were in an early 2000 model RW are the exact same as a current model, maybe. I know most products have modifications to their components over such a span. I didn't care to delve into it at this price point, so it's all unfounded, speculation.
The one thing I'm curious about with the faulty Sub 10/12 is if some users didn't have them plugged into a surge protector or power conditioner of any kind; that could be one possible explanation for some of the amps going out.