New Rotors....Slotted and Drilled???

Hi:
I am rebuilding the front suspension and brakes on my 1974 Scamp.
The rotors are very slightly undersized...the rotor has .94 minumum inscribed on it and the rotor is at .92. I am going to replace the rotors and was wondering if drilled and slotted rotors are really worth the extra cost.
At Rockauto, drilled and slotted are about 35.00 more each. What do you think???