I started having problems with a bulging disk in my lower back last fall. About that time some research came out that concluded that a 45 degree recline position was the best for relieving strain on the lower back. I really couldn't justify dropping a grand on an Aeron, so I checked out the local Office Max. The Sealy Posturepedic Leather Executive had the necessary recline and other adjustments, and was only about $200. My only real complaint is that it could use a bit more padding in the tail bone area. But my back doesn't hurt any more.