I've thought about doing a 16th Century Knight as well. I already have the breast and back for Pikeman kit, so really all I'd need to add is the arm harness, gorget, and helm to match the pictures you posted. I think I I were to decide to go with full armor, meaning adding leg harness too, I would opt to get a second breast and back, this time without the tassets. I like the tassets for my Pikeman impression, but I think they would annoy me and get in the way with a leg harness. Maybe someday I'll do this, but by this time the idea of High Chivalry was long over and the role of the Knight had changed to more of an administrator and battlefield commander. These are not what I think of when I think of a Knight and I am first striving to put together a Knightly kit that embodies the romantic ideas of High Chivalry.
My the way, my armor came from Illusion Armoring. They have a long waiting list, I just checked their website yesterday and they are currently accepting orders for January delivery, but they allow you to order and make payments, sort of a lay away deal. I also can not say enough about their customer service and communication. It was A+ in my book, Lynette answered all my questions pretty quickly and I got exactly what I wanted. The fit of my breast and back is incredible. I know IF I ever procede with this idea, Illusion is where I will order from, barring Allen reopening Merc Tailor.