I've never carried a handgun with a manual safety, so my preference is DAO or DA/SA. In a DAO action, Sig's DAK is a very sweet trigger to shoot with, very very revolver like in feel. However, my personal carry choice is currently a Sig P239 with the DA/SA trigger. When I've been practicing with it the transition doesn't bother me a bit. However after spending most of my range time this summer shooting my 617 to save money I've found that I am now a bit more accurate with the P239 on the first DA shot than I am with the subsequent SA shots.