My opinion, YMMV:
Wenzel - absolutely not under no circumstances should you go to Wenzel, ruined several teammates seasons when I was in Norcal, unscientific, generally bogus. Oh yeah, and Eddie B was implicated in doping... brilliant...
CTS - overhyped, some coaches are good. Others not so much. Consider Hunter Allen's programs instead if you are looking to purchase an 'off the shelf' product through CTS.
Ric - Solid scientific coaching from someone who has been in the business for a long time and has experience at all levels of the sport. Associate coaches are vetted by Ric and are generally very on top of things.
Josh - I've heard some good reports and read some intelligent sounding things from him but haven't had the experience with him to say one way or the other.
Judging from this list, are you based in Norcal?