Here's another vote for the Glock in .9mm. That's a very good home defense gun! The .9mm's of today are no joke. They'll kill dead! Besides that, long arms are very difficult to move around with in your own home. Takes two hands, can be easily grabbed, etc. We've all heard this before. With a pistol, you still have one hand free to work lights, be on the cell phone to the police, etc.
You're not under-gunned w/ that Glock at all my friend!
2 Thes 3:16 "Now may the Lord of peace Himself continually grant you peace in every circumstance. The Lord be with you all! "