I'm no closer on the deciding on speakers or the preamp however, my amp decision is finalized.
I picked up an 8th month old Anthem P5 for $4K on Ebay. 325 watts all channels driven, stable into 1 ohm, dual power cords, 130 pounds of audio nirvana.
At least I will not have to wonder if I should upgrade my amp anytime soon.
-Brian