Waptap, the first couple of things you might want to check out is an spl meter and set-up dvd. Start from the bottom and work your way to the top. Calibrate your set-up and see if that helps. Also, work on placement. If you are having trouble discerning dialogue check to see if your center channel is pointed towards your ears. Maybe it is pushed too far back on the shelf? Think of it as a small investment with which to build a home theater around. If the spl meter and the dvd help with your current set-up, then you are good. If you still find yourself unsatisfied, you will need the two things to help set-up your new equipment.
If you need help with specifics don't be afraid to ask. I know nobody has responded to you yet, but this place gets a bit slow on the weekends. This is a holiday weekend, so things are even slower.
Hang in there.
