Anything between Causey and Lost creek is a great bet. All those CWMUs hold big deer. How the CWMUs are run is a different story.
Skull Crack holds some huge deer. If you google "Walt Prothero" and read some of his books on mule deer you will see the quality of bucks on there. He hunted the land religiously before it became private land. He shot a 30+ inch buck every year for 7 years I think on there. There are some huge bucks on there.
Skull Crack only gives out 1 tag to the public and there are plenty of applications, so I wouldn't get your hopes up for that one. The operators run a crappy operation anyway (From what I have heard).
As far as a Quality hunt with some trophy class deer, I would say Deseret is the best. Very rarley will you find a CWMU that has trophy class deer and is run by good, honest, kind people. It's usually one or the other.