Do you plan to shoot single action or double action? Might consider that the trigger in the 28-2 is typically a narrow grooved trigger, the trigger in the 27 is often the wider grooved target trigger (I don't care for that myself), and the trigger in at least my 686-3 is the smooth narrow trigger (I like that one the best). I am sure there are exceptions and variations and if this is important to you, others can advise better.