I used to keep a revolver. Now I keep a Taurus PT92, with a PS90 as a backup.
Overkill?
Last year one of my neighbors had their house broken in to by *5* armed intruders, specifically looking for guns.
5, 6, out of a revolver, 7 or 8 out of a 1911, even 12 shots in a Glock 21 might not be enough when it's 5 on 1 odds.
So now, it's high cap 9mm's strategically positioned, with the 50 round PS90 as backup. If I can't do it with 16/17 rounds + 50 more, it isn't getting done.
My advice, examine the threat profile in your area and plan accordingly. Talk to the cops, watch the news, get an idea of how many bad guys you are likely to face.
Here, it's large groups hitting isolated country homes in the middle of the night. Police response time is slow (20-30 minutes). Bad guys know it.