You should have told us you were going to do that... Had you started with the K-Horns, the RF7 is a baby... Little bitty guy. Haha.
Honestly, The RF7 isn't for everybody... The 1.75" horn is a lot of horn. The brightness of that speaker exists more in the midrange. Rob has done the right thing by treating his room.
Without reading this whole thing again- what exactly is it do you feel like you're missing again? Compare your "surround" sound experience with just watching TV. The more I think about this- even though you're far from an ideal setup, Its hard to imagine it being so disappointing. It is possible that its not set up correctly, yes?