Nick, I am a Sig Armorer and carry a P229 DAK daily. My own opinion is that the DAK really is a nice double action system. On a new gun it may feel a bit heavy, but most will settle in to about 5.5 to 6 lbs. The trigger stroke is smooth and consistent all the way through. The other two main features are 1)restrike capability. If a round does not go bang the first time, pull the trigger again with no need to reset or rack the slide. If it was a light primer strike/dirt etc the round may go bang on the second strike. 2) The DAK trigger has two distinct resets. If you only release the trigger to the first reset the pull will be about 3/4 to 1 lb heavier, as you have less leverage. However, most of the folks I work with carrying this system learn to only release the trigger to that point. IMHO it makes for a more consistent follow up shot. And, you can both feel and hear both reset points.
In my line of work the DAK fits the bill nicely. It also makes a nice concealed carry gun as there is no safety to disengage, and little to think about aside from pulling the trigger. No decocking to do, and less chance of an AD on a follow up shot. Overall I think it's a nice system, but find someone who has a DAK and shoot it, see if you like it and feel comfortable with it.