My 15 year old son is picking out a new pellet gun. He will use it for target practice and occasional pests.He likes the 1377 because it is highly customizable,He likes the quest for its 1000 fps. I have looked at the reviews for both of them and have seen nothing bad,Please tell me as much as you can about these airguns(pros,cons,personal experience,what you like/dislike about both of them.Answers are greatly appreciated!