The images are fixed now. I made the mistake while putting that together and didn't notice it until a day or so after I'd posted. And frankly, that's my issue with 45, 46, and 50. They are too simple. too smooth and too similar to each other that, at a glance, I can't tell which is which. Admittedly, a part of that is because I have more familiarity with the earlier armors, but I have not cared for the smoothness of the armors since AoU.
On a personal level... while I don't mind the 43 and it's stuck around on my shelf because it was the last version I liked... yeah, the earlier armors are just better representatives of the character.
As for which one I'd go with... hrm. I get why Benton likes the III, but I don't like the darker red. Later armors use a brighter red (unlike Cap whose outfit became a darker blue over time) and I prefer that. It also shares an issue with the mark 4 where there's a bit too much red. Overall, I really like the VI because it has a better gold/red balance (the legs and arms specifically) but I'd be lying if I said I wasn't put off by the triangle chestpiece. The VII is iconic, being THE armor for Avengers, but MAN do I hate the silver on the legs so much.