I really like my Daniel Defense rail, but will readily admit the LaRue wasn't on the scene when I chose mine and would have been a good choice as well. To complicate things, since that time the continuous rails have become popular.
If I were to do it over, I would go with a Troy MRF-C, or MRF-X, or MRF-R depending on barrel/ length/gas system. (or comparable Samson)
or if it were available.......the KAC URX
See "the reviews" ------------>
HERE