The Spohn piece is adustable and it looks like it can be installed or removed without taking the driveshaft off.
http://www.spohn.net/productimages/991_big.JPG

The BMR unit is 1 non-adjustable piece that requires the removal the the driveshaft for installation or removal.
http://www.bmrfabrication.com/misc/DSL001.jpg

I guess it doesn't really matter which one I get, but I just can't decide!

Or maybe I should just save myself $50 and get the Lakewood
http://www.jegs.com/cgi-bin/ncommerc...29&prmenbr=361

 

Whatever one is cheaper...they all do the job.

 

I do not think you can go wrong with a BMR or Spohn loop. Personally, I like Spohn stuff better.