That's awesome going fixed is so fun I remember my first couple rides were awesome not knowing how to stop and learning how to slow down and ride safe. I would try to just get use to the crank arms if I were you instead of spending more money unless you have it. I ride a thrasher trick bike to commute with 160 crank arms that came with it. Then i'll switch to my surly steamroller with 170s and I notice a difference at first then after a few minutes im fine and it doesn't bother me.