Glock Inc issues all their full size firearms 17,17L,18,20,21,22,24,31,34,35,37 with 17lb recoil springs. Looking the list over you will notice a wide range of power in each model.
Yah sure you can change your spring weight. It may even be beneficial. When you decide to make a move you should consider a stainless guide rod and ISMI springs http://www.lonewolfdist.com/Search.aspx?TERM=lwd-gr