What gun to get for Home Defense

So, I recently got rid of my Glock 26 and I have a Glock 19 for carry. I want a white light and optic on it. Id like to get another g19 and make it almost identical to my ccw. But I keep getting people saying you need a sig. What would you get? Sig? Glock? Ruger RXM, PSA dagger? Let me know.