Hi Neal.
When I was looking into my 1s purchase - Peter King was very helpful and he sells ready build quads / Hex's with the ArduPilot controller. When I spoke with him, he said it does all the Naza does and more for much less.
This is his youtube channel :
http://youtube.com/user/westmidscom/
I didn't really find where the best place (UK) was to but the controller / gps on it's own though - please post if you find out
