Thanks for the info on Argon Audio, I'll check them out. I have looked on eBay and it seemed there was a wide range of prices. I listened to the n804 a couple weeks ago and definitely noticed a difference, but it was in store. I've never listened to anything from the 800 series before that because they were all out of my price range. But a used pair in good condition might just work out. I still need to go back and take a long listen to them to see if I like them enough to buy another pair of speakers, when there really is nothing wrong with my current ones.
Thanks again!