do you mean the current forks give the bike an uncomfortable riding position? If so a rigid fork wont really help. I have a MTB that has a lockout option and commute 25km one way. A bouncing fork will rob some of your speed but honestly I did a few runs with the lockout and without and there wasnt that much difference as far as times. If anything having the fork not locked was more comfy, but I rather have them in the lockout position =p. I say save your money and ride her as is, and when you know your more serious about it then change out the fork if you still wish to do so, who knows you may want a new bike entirely.