Do you mean rich text editors? If so, then the whole point of MODx is not about forcing users down a particular path. We typically offer 3-4 ways to get to the same end result.
As far as RTEs go, I personally prefer raw code. If I had to choose one though, it would be Tiny MCE cause it tends to not futz with existing code so much.
Ryan Thrash, MODX Co-Founder
Follow me on Twitter at @rthrash or catch my occasional unofficial thoughts at thrash.me