Which fan are you a "fan" of?

I have the Hayden 2947 on mine. It was the only one thin enough to work for me. There is almost no clearance to get the water pump bolts in. I had to use studs loctited into the water pump and nuts because I couldn’t get bolts in it. It works great, but have a whole box of nuts for the ones you will drop and an ample supply of swear words....
What fan are you using?