I'm of the belief that cross levers are the most practical levers available. Generally the only times I use my brake, or want to be able to use it are in these situations:
1. I'm riding through traffic.
2. I'm going down a long steep hill where I have poor visibility.
And in both situations I do not want to be extended/dropped in my setup (I use RB-021 so my bars drop a bit on the horns) and I would prefer to be able to stay on the flats.
P.S.
Dat LeMond