I used to dismiss DAO pistols, had no interest at all, but in the last couple years, I've found that I actually shoot noticably more accurately in double-action. This has been with numerous pistols: several gen3 Smiths, Walther P99AS, CZ75BD, etc.
I first noticed this during the testing phase after scoring a used pistol I got on my local Armslist scene. But then, if i was having a bad day at the range, just to mix things up, I'd use the decocker and go to DA for a few shots, and my groups would tighten the hell up !! These haven't been aberations, this has held up consistently for a good while now.
So, lately, I've been keeping an eye out for a nice DAO gen3 Smith in my local used market. Fingers crossed !!