I am as pro gun as you can get.
If you decide to get a firearm for home defense don't get caught up in what is best.
Get a tool that runs and is easy to use. An good example is a 12ga pump shotgun.
Your money is best spent on ammo, range time and a safety course.
Good luck and feel free to pm me with any firearm questions. I can point you in the right direction.
This is a car forum and don't want to post a lot about guns here. There are great forums for that too.