Well, I haven't recieved either one from Aeromedix yet (I ordered on the 29th and New Year's delayed it). I still can't get over how I ordered the AeroFix instead of the Terra Fix---I just thought I would have noticed that. I guess in the long run it really won't make a difference. The label on the PLB, color of the holster, and wires seem to be the only difference.
As far as the connectors go, I don't think I'll be using them. I always have a small Garmin ForeTrex 101 in my backpack, but its reception can't be any greater than the onboard one on the ACR unit.
I also ordered a padded, waterproof pouch for the AeroFix from Pacific Outdoor Equipment (the G-Pouch). Earlier, I had considered an Otter or Pelican box, but those weigh as much as the actual unit. They would protect it from anything, though. Almost indestructible.
The package should be here by the 4th, according to UPS.