That's a tricky one. I assume your Pioneer isn't a true zone1/zone2 type receiver; in other words, you can't send separate sources to separate speakers?

If so, I'd say get a cheap stereo receiver off of eBay to put in the kitchen. I use an older Marantz for that; I think I paid $80 for it. I'm not using 3 zones, though, and my H/K does support true zone 2.

I am the Doctor, and THIS... is my SPOON!