I am new to cycling and want to purchase a good quality bike to ride on our Rails to Trails where I live. I am having a hard time decicing what bike to get. I don't want to do much off road right now but may get into that later. I have looked at both Trek and Giant and like things about both of them. I would like recommendations on which brand would be my best buy. I am an a limited budget and would like to stay under 500. Thanks!