I just ordered a set of the Truglo fiber optic/tritium sights for a .45 that is due for a rebuild/refinish.
I don't think very highly of the tritium night sights, but I really like the fiber optic sights. They really jump out at you and improve your shooting.
But, for a few bucks more I can have both. Um, why not.
However, I've never felt under-equipped with the Surefire in my mag pouch and the .45 in my right hand.
The absolute best reason I know for tritium sights is so you can find your gun in the dark, not so you can aim it at a BG.
re: point shooting, I practice this on a regular basis. I choose a target, look away and draw on the target. A well-fitted firearms will be aimed very close to where you are pointing.
In addition, I've been shooting IDPA for more than a decade. I never aim until the target gets beyond seven yards. You will be hard pressed to find a target in your house that is beyond seven yards.