Small brewery pump
The March magnetic drive centrifugal pumps are pretty nice, but may be too slow for a 1BBl. I have 3 of these running the mash tun operations on my 10 gal. system. They have one with a stainless steel head too.
This is probably a pretty good choice for you:
Peristaltics and diaphragm pumps will not hold up to the temperature requirements. I use a diaphragm pump for doing 10 gal. batch transfers only and it works great.
Stay away from anything self priming for hot water pumping. I have a self priming rotary vane pump as my main pump on my brewery and it has a tendency of cavitating. Its one of my engineering regrets.
There are some pics of my pumps on my website blog.