The best choice is to ge a Ithaca Model 37, the factory has a lefthand safety that can be installed very easly.
With the cross bolt safety your grip on the gun is not altered when operating it, just a push with the finger. With a tang safety mounted forward, your grip is compromised when the thumb is moved.
Lastly there is no safety piece interfearing with your field of vision. I have a 500 in 20 gauge, but when mounting the gun that safety is distracting to me as the reciever is not a smooth surface with that piece of plastic sticking up.