Interesting that you asked about both Pioneer and Panasonic.
I am on my second Pioneer receiver (VSX-1014). I really (REALLY !) liked both my Pioneer receivers (first one was a 1999 model), but do not consider myself a "pioneer only" guy, it just so happened that these two offered the right price and the right features for me.
HOWEVER, I am seriously considering getting a Panasonic XR50 or XR70 for my Dad for his birthday and Fathers day. (The JVC digital receiver is also a serious consideration).
Reason being, is that the light weight, combined with a digital amp, combined with a "simpler" configuration, might be more in tune with my Dad's needs, not me, who wants to tweak each and every detail.
I am still 4 months away from a decision, but I like both the Pioneer for me, and the Panasonic for my Dad.