Most double action only pocket triggers are crap (s&w bodyguard / ruger lcp). I do like the khar trigg though.
I went with the sig 238. Mostly because of the single action only. The way I see it, if I'm defending myself with a .380 (which most people will debate it's effectiveness), I'd like to be able to fire off rounds faster and more accurately than with the double action only pistols.