Originally posted by: YOyoYOhowsDAjello
I don't know anything about that KLH sub, but I do know that the Dayton units are pretty solid for very similar prices so I would recommend going with one of those if possible.
R50s would work fine. Remember to check out shipping differences with ordering the speakers individually in two orders vs. together. I think people have gotten lower shipping costs doing separate orders.
If you're sure you need to use the TV speakers from time to time, then yeah, you wouldn't want to route everything through the receiver first.
This system is going to have a volume control though

You can just turn it down or even turn the sub off when you want to have it quieter vs. using your TV speakers. No need for it to be loud just because you're using real speakers.
I don't see why you wouldn't want to use your higher quality components for all your sources vs. just for DVD. Maybe you'll try it out anyway and figure out it would benefit you to always use the system and just turn it down to your taste
As for the power bill... I'm not sure how much the 304 draws, but I don't think it's going to be that significant.