I agree with oneounceload's statements, but will just add a couple more.
It seems that there's a couple different approaches to home defense. Some people have more of a search-and-destroy mentality where they are going to deliberately seek out and confront an invader. Others plan to grab their gun and hunker down (with their family if applicable) in a safe room while waiting for law enforcement to arrive. Depending on your approach, your needs may be different.
You don't necessarily
need a tactical model. Many people rely on their hunting shotguns, and there's really nothing wrong with that. In fact, if one gun is used for many purposes, the user may be more familiar and proficient with it. The potential advantages of tactical models are that they usually have shorter barrels, which can make maneuvering around the house easier, and they tend to hold more shells (like maybe 8 in a tactical gun vs. 5 in a standard pump or semi-auto).
A lot of tactical models have different grips/stocks than hunting/sporting guns. However, a lot of the shotguns used by military and law enforcement just have standard stocks, which leads me to believe that fancy tactical stocks don't necessarily live up to their marketing hype. Some tactical stocks also change your sighting plane and/or make it more difficult to manipulate the gun's safety switch. Guns with a pistol grip only (nothing to put against your shoulder) are discouraged by people who know what they're doing. So are forends with pistol grips. So
this gun is a no-no.
As for accessorizing your gun, there's a lot of stuff out there, but much of it is more about looking cool than being functional. There are various red dot, holographic, or ghost ring sights available, but at typical HD distances (which statistically tend to be inside of 8 yards) I question the necessity of such sights. Many experts recommend mounting a flashlight and a sling on the gun, and leaving it at that.
As oneounceload said, some semi-autos may be finicky about ammo, but in general, they've come a long way over the past few decades, and I wonder if a semi-auto might actually be more dependable than a pump in a stressful situation. I say this, because semi-autos leave less room for human error, and I tend to think the shooter may be more prone to short-shuck a pump in HD situations than an auto is to malfunction. Most semi-autos will also have less felt recoil than pumps, which may be helpful if and when multiple shots are needed.