Trying to decide which .22 L.R. semi-auto pistol to buy for my adult daughter. It's for recreational target shooting, not self-defense or conceal carry. She already has a Ruger Mark 2, but it's too large and heavy for her comfort. She likes the size, feel, looks and weight of the Walther P22, Ruger SR22 and Sig Mosquito. What are your thoughts as to which is best? - thanks friends!