I have a GT GTR series 3 road bike that i just got and i want to upgrade the pedals to clipless pedals, i currently have toe clip pedals installed. I ride to and from school everyday and i do rides with my friends around on the weekends. I dont mind carrying an extra pair of shoes around. I am leaning towards the SPD type pedals because that is also the type of pedals that they have at the gym that i go to. What type of clipless pedals would be the most beneficial in my situation?