I was going to mention Drathaars too but as usual Ness is on it. I've hunted behind truly excellent pointers, setters, Brittany Spaniels, GSP, draathars and Labrador Retrievers. It's more the quality breeding and training than any particular breed if you ask me. And of course the individual dog. They're definitely not all created equal. And for what it's worth, could not disagree more with Wrench about making your hunting dog your friend. Makes for a very special relationship of trust between man and dog both in the field and at home.
If I could have one wish regarding hunting, it would be for the quail hunting to be like it was when I was a teenager through my early thirties. In those days 20 and 30 bird coveys were not uncommon where I hunted and multi coveys were the norm. But alas, I don't think that's in the cards for anytime soon..