I just replaced mine, and went with a Mehle unit at a tick over $250. The Behr clutch was about $1000!! There are much cheaper URO units at under $100, but I would be skeptical of those. Another decent brand is Hudson.
I replaced it myself, but my car does not have a shroud around the radiator, and that would complicate things. I also did not need to take off the hood (or drop the radiator out the bottom).
It is a bit of a squeeze to get the fan in and out, especially if you have the spacer on the front of the water pump puller. Patience won out
I also put thin cardboard between the fan and the radiator to protect the radiator.