To backtrack a little and look at the OP, "How much should a gun/trigger system matter?" I find it interesting to look at TLG's recent decision to go P229 over P30. He said, "The driving force between the HK and SIG for me here was trigger quality, by far." So while conceding the HK was likely to be the most durable/reliable of the two, trigger system was the trump card.
It just depends as many have said on what you are trying to accomplish. (FYI no dog in the fight, I have P30 LEM and like it)