My understanding is that it’s the housing, not tubes, that are recoil sensitive. So, all of those options should perform the same in terms of durability. However, I’d not put it on anything heavier than 5.56 or 300BLK, and you may want to call TNVC about option 4 behind 5.56. If we are talking about value, I’d go with either 1 or 2 and not look back. That’s what I did. The unfilmed, white phosphor units are more designer than value.