Okay, I take back what I said about the surrounds not being loud enough.
I put the shelves up so that the tweeters are three feet above the ears, like I said. Today, a friend and I watched a movie that does have lots of surround:
Cube Zero (not as good as the first
Cube, but miles better than
Hypercube), and the surrounds were incredible. I hadn't increased them at all, I left them at YPAO levels, and the surrounds kicked *ss! I was completely blown away by how much better my new setup is; I could finally hear things coming from the opposite surround, and it made for a far better experience. Thanks to everyone for their help/advice!
cheers,
supervij