The majority of servos have 120 degrees of throw, retract servos have 180 degrees. The amount of linear throw is based on the length of the servo arm, and there are aftermarket horns available.

The "best" method of connecting the servo norn to the control surface is a short, straight, solid rod. Less chance of "slop" in the control.

Hitec makes reasonably good micro servos (their HS-50's or 55's), and their mini servos are quite good too (HS-81's). The "major" manufacturers, Futaba, JR and Airtronics micro servos are extremely overpriced in my opinion, and no better than the Hitecs.
Dennis-