In combination with the Parasound amp and pre-amp, I went with the NAD C356BEE integrated amp with built in DAC module. The NAD will drive four speakers at the same time which will be perfect for the four in-ceiling speakers in zone 2 (the kitchen).
I also plan to get an Audioengine B1 bluetooth wireless receiver. This unit will send output signals to both Parasound preamp (using RCA cables) and the NAD Integrated amp (using toslink cable) simultaneously. Although it will be rare that I play the same audio in both zone 1 (living room) and zone 2 (kitchen) at the same time. But I believe I will accomplish this flexibility. I believe the B1 receiver will also allow my wife to watch her TV shows on her iPad in the kitchen while having the iPad audio play through the ceiling speakers instead of the iPad speakers - this would be a big win!
Lastly, I will run a separate USB cable through the walls from NAD to the kitchen just in case the quality of the bluetooth audio from the B1 is unacceptable (to me).
One question - where do you guys typically locate the IR repeater sensor in the kitchen area?
Thanks again for everyone's advice - I really appreciate it. This is what makes Audiogon so special!
Matt