If you have power top convertible, Power Windows are the Only choice, obviously, If not convertible Power Windows still excellent choice
There are several companies that have conversion kits, if you plan to drive long trips, cruise also an excellent choice
I have every late model convenience in my 69 camaro convertible, a/c, power windows, remote door locks (saves the key locks scratches on the door locks), tilt column, power disc brakes, etc.
Do it and drive it.