Maneuverability is one of my concerns, so my home-defense shotgun is an 870 Express Home Defense in 20 gauge. I put a youth stock on it, which lowers the LOP from 14" to 12" and makes for a very light and compact package with the 18.5" barrel. This is an excellent and affordable setup, and I was sorry to see Remington discontinue their 20 gauge security models. The 20 gauge is easier for my wife to handle, and 6 + 1 rounds of #4 Buck should be more than sufficient to deter unwanted visitors. My Mossberg 590A1 Retrograde is still my favorite shotgun, but its just a little too large/heavy to be my go-to in a home defense situation, and my wife doesn't shoot it as well as the 20 gauge. In the unfortunate event that the gun is ever actually used, it wouldn't break my heart to have the Remington sit in an evidence locker for a few years, but I would really miss the Mossberg.
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