I have the Super Nova pump with pistol grip and love it. I don't currently use it for HD as I essentially live in a studio apartment and it's, in my opinion, inappropriate as far as response time. If I'm reaching for a weapon to defend myself it's because I am already seconds away from an attack, and a handgun seems like the only appropriate use for me.
That said, in a normal house or even multibedroom apartment, it would make for a great home defense weapon. It's incredibly light and reliable. I've had a few problems with reloaded shells that were admittedly visually "iffy", where a few whacks against the action with my hand were required to release the problematic shell.
Only limitation it has for home defense is magazine capacity. By design, and style, the magazine is MUCH shorter than the barrel. I believe you can get a magazine extender but in my opinion, if you plan on doing that, you may want to look at another shotgun. I just think it would ruin the look, and besides reliability, one of the things you're buying from the Benelli brand name is looks.
You wouldn't buy a Cadillac and then put a snow plow on the front, would you? Well that might be cool but still lol. My point is that sometimes when you upgrade the functionality, you degrade the quality.
As far as a flashlight goes, I don't think you should do it as a matter of common sense. If you're sweeping your home and theres a guy with a gun who sees a flashlight coming at him, I'd be under the impression that he'd shoot at the light since it's the only thing they'd see, and that puts your torso/neck/face in direct line of fire. I'd keep a high intensity (blinding) light next to your home defense gun (or closer if the hd weapon is a few steps away) and hold it away from your body. Better to take a bullet to your arm/hand than your chest/face. In my opinion.