In my view of things, a DA is a useful tool and safety feature in this case. The gun is every bit as deadly, but it's not going to go off unless you are FULLY COMMITTED to the squeeze. A lot less chance for a AD, less possibility something is going to happen that really should have been prevented. Lets keep in mind, there are a number of reasons NOT to shoot an intruder---daughter's boyfriend sneaking in/out (even though you may want to shoot him at the time), son/daughter sneeking in/out, whatever. I live in a college town, 2 blocks from the university. Most houses in my neighborhood not only look alike, but most have basement apartments that rent to students. I scared the be-jeezus out of a poor kid last fall when he came stumbling in late, trying very hard to be quiet, but was actually intending to be at the house next door. I really wouldn't want to have it on my conscience to have shot a drunk college kid for trying to make it to his buddy's house to crash for the night but found mine instead. There could be countless other reasons for an intruder that doesn't deserve a bullet. DA is still just as "ready" as SA, but a little safer for both sides at the same time.