Congrats on your RDX. I have had mine about 3 weeks now and am liking is so for. Dynamically it is different from my lease-returned 09 TSX, but that will take some getting used to. I love the power too, and have never owned a Honda/Acura vehicle with torque. :-)
On a short highway jaunt I approached but never reached the advertised highway fuel economy; had the trip been longer and with flatter stretches of road it probably would have.