I'm doing homework for a new bike and was wondering if anyone can help. I want to ditch the 105 triple on my old bike for a double, keep the aerobars and use it as my flat training bike.

And... I want to get a second bike as my touring and "climbing bike", hence my need for a triple. I'm not finding that in Sram or Campy so I'll have to go with Shimanos... but I really do NOT like the shifting on my 105 triple. It is in constant need of tuning and the levers are a haul for my small hands. I don't know how many times I've crested a hill and dropped my chain if I don't crank hard enough to move up a ring. I don't like to ride hills while not trusting my bike, esp when I'm in a group. Does anyone here have a triple in Dura Ace or Ultegra and have that problem? And does it make a difference between an 11- or 12-cog cassette?