I've heard good things about El Diablo, but unfortunately the only Jim Fazio original course I've played is also one of the most horrible courses I've ever played...It is called "Country Club of the Poconos at Big Ridge" in PA, and anyone who has been there will readily attest to it's horrificness (is that a word?)
I know he worked with George in great detail on a NLE course called Hidden Springs which used to host an LPGA event in the 80s in PA as well, and that course was pretty good. Unfortunately, it got plowed over and is now a Palmer/Seay effort called Commonwealth Country Club, again near Philly.