For a rifle that is going to be shot from a bench or other structured competitive use I'd use (and do) an SSA-E.
For a rifle that is not going to be a target gun - the Larue MBT is my choice.
For a duty rifle, I'm probably buying a high end AR with a high quality factory trigger so that if it ever gets used I don't get accused of installing a super-duper-extra-dangerous "hair trigger" making me a bloodthirsty evil monster.