Yeah, good call ErinBluEyes.. I totally agree.. marching french horns are a pain to play, ESPECIALLY while marching. And I disagree with what Chris Nalls said earlier about marching horns sounding like french horns in a good players hands.. While this may be true with a great player standing still, what about while marching, you can only play about half the volume of a mello, and while yes, they do have a better tone than a mello, you wouldn't be able to hear its sound in the midst of a drum corps playing forte.
The marching french horn is a dirty dirty beast.. And also Chris Nalls also said its good in the hands of a great french horn player.. but most D1 corps don't have many french horn proper players. My corps only has like 3 french horn players (including myself), the other 9 are trumpet converts.