I do not believe that there is a touring specific group. Shimano at one time had a trecking group but it did not seem to be a good match for touring.
I will continue to stick with Shimano components, but similarities exist for Cane Creek, SRAM, etc.
Feel free to choose from road (Tiagra, 105, Ultegra) and mountain (Deore, LX, XT) groups to get what you want. Buy the best group you can afford, just remember that weight that rotates is more important that weight that does not. The importance of rotating weight is amplified by the radius it rotates on. So in a hub, durability is more important than weight. In a rim, durability and weight are important.