So, in good salty fashion, I'm still on the cocktails and thinking about it. Never pulled the trigger.
I have decided, when I do divert the boat bucks, that the 88lb Rocna is what I will do. I think that is the larger specified for our relatively low displacement (20+ ton) for a 55ft boat. Our buddy's 49ft Taswell weighs more than we do.
As for selling the bling anchor, I've given up hope. A stink potter is a pretty good idea, but it would have to be a monster stinkpot. Stink potters never have sufficient ground tackle.
I do have to say, however, that I've not had any real trouble anchoring with the CQR and 1/2" chain. In fact, I just upgraded from 200 ft of G4 chain to 300 ft of G4. At around 900 lbs of ground tackle, it's simply like dropping your own mooring.
p.s. I'm in the minority, at least around here, but I'm just not a fan of Mantus. Fine for a spare that can be disassembled. But for a permanent anchor, I highly question corrosion on the confined threads and the abrasion of the galvanization on mating surfaces. I also don't buy that they are so much better than the Rocna or Manson, which causes me to question their integrity a bit. That last part may be unwarranted, I'm more focused on how they will hold up in the long run.