Hey robnow - I am getting my Push'd Monarch Plus RC3 tomorrow, and will be taking to the NC mountains this weekend. I'll have a detailed review for you on Monday. It's going to be put on an HD140, and I'm a lightweight rider at 130lbs in the buff. The riding is going to be pretty mountainous; my buddies and I are doing the Offroad Assault on Mt. Mitchell course, so many thousands of feet of climbing and many heinous, rocky, rooty descents to test it on. I'm stoked!
I think the main decision between RT3 and AM is whether or not you use propedal switch a lot. If you're the kind of person who flicks it on and off a lot for climbs, then RT3 is prolly more the answer. If you're a set-and-forget person, then AM. The bigger decision is between getting the RT3/AM or coughing up the extra cash to get the Plus. Or, you know, getting a vivid air or a coil. Decisions, decisions.
After talking to Eric at Push, I sprung for the Plus because I wanted more downhill performance for jumping and extended downhill runs, while not sacrificing the ability to have a propedal-like switch. I'm hoping the shock lives up to my expectations. I'll let you know in a few days!