Not sure how you came to group HA, PP and BO together? HA & PP are significantly more expensive, complicated and seemingly effective.
BO has more in common with the Reese DC etc; choose your poison.
If I had more available payload and $ to spar I might upgrade my Reese DC to a PP, but the cost of a new PP setup would cover my upgrade to a 3/4 ton too...
If you enjoy tinkering and are hands-on, the Reese DC is a great setup. It takes some playing around to dial it in for your setup but is a great WD system.