Doc,
Rob offers some good advice. Since Blue's speakers were wood to marble conversions I imagine they are the 9300 tweeter, which without trying to stereotype, is a bit mellower. If you decide to switch out, I would suggest going to the 9700. It will definately add some more sizzle.
But before doing so, I would put Rob's suggestions to a test. I have also found a different i/c or speaker cable may get you where you want to be. Best of luck.
Regards,
Jeff