it all depends on what your looking for out of your rhino, and what kind of person you are. If you don't want bling, no fussing, no adjusting, no nothing but excellent performance, and extreme value, go with the bilsteins.. check the latest Cart Wheelin magazine for proof. If you want all the fancy stuff, and want to play with adjustments, and will never be satisfied, and have the extra money to throw down, go with the adjustable Elkas..
If i was starting over, i would go bilstein hands down. they simply work, and work very well. save the money for engine stuff to go faster, because the shocks will keep up.