Your list pretty much covers the Big Hitters when it comes to a 6" custom Limited gun. Everyone you have is excellent & can't go wrong with any of them (I know first-hand).
Kevin, I know Mike Dame comes down to MI to shoot pretty often, he would probably know what you'll need. Roy Neal can get you his contact info, but I'm pretty sure he's on Enos also.
When I ordered 3 cases of 124 cmj's last week you were limited to ordering only 1 case per week of the 124 jhp's, so they must have been running low & wanted to give more people a chance to get some instead of none. I only use their 124 cmj in my 38 sc & personally preferred them over the jhp's.
You'll have 1 year under your belt & you'll hate yourself if you don't shoot. It's a blast & you'll be a regular participant every year - remember every single shooter had to bite the bullet & jump in without being the next Vogel or Eusabio.