For all of you saying distance doesn't matter I ask you this: you are looking at a 180 yard shot, would you rather be hitting a 4 iron or a 6 iron? People who get the difference between the two understand the importance.
Catching up here, but from my perspective I want my distances to hold true based on what I've been previously seeing from set to set. I want to know my yardage gaps remain consistent regardless of the number on the club or stated loft. So if a 7i is my new 6i distance, that's fine and I'll adjust, but that isn't the reason I'll be gaming that set.
To answer your question, no doubt the 6i.