I love ramblers. Great tire. While I have no problems with them, they are not heavy duty.
Some brands have extra rim protection to protect against pinch flats (often looks like a piece of cloth wrapped around the rim bead and going up ~5mm.
Leonard Zinn and/or Cycling tips have discussed this problem in the past. Part of the cost of hooked carbon rims is the extra machining, manual labor, and discard rate (due to problems like this) required when putting a hook in the rim.
If you are riding under 60psi, you probably don't need a hook. Certainly if you are going a lot over 80psi you do (but who here does that??).