Only ever used Shimano and never had a problem with it- but the higher up the spec you go- the better/ lighter/ smoother it feels.
Dare say it would be the same with Sram or Campy.
My LBS is into Campy or Shimano- but they do carry better stock of Shimano. I can go there and get any spare from the shimano range that I could possibly want- wheras I might have to wait for a Campy F.D. in the size I want. So what does your LBS Carry?
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How long was I in the army? Five foot seven.
Spike Milligan