I would go with the second pic. I made mine something like yours. Only that mine follow the body line in the middle of the door.
Mike
Here are a few pics. I used 1" square tubing and metal shelves to cap the door. If I could do it all over again. I would not make the cuts so square looking. I also kept the driver side mirror...so that I would be legal on the street. I used the inside door latch and welded it to the top part. I would of liked to have added a cup holder. But their wasn't much space between the square tubing under the top section.(frame) Careful, when marking the forward part of the door you want to cut. I cut mine a little to much and ran into trying to figure out away to not cut into the forward section of the frame behind the door skin. In my last pic the location I am talking about is behind the toyota badge on the fender and aft of the driver side mirror...moreless where the door hinge is at. Just double check what you will be cutting behind the door skin...and decide if you need to move your lines before you cut. I also cut a half inch above the lines I marked. I then folded that half inch to a 90 degree angle. something for me to place my cap on(weld). Just giving you ideas on how I did mine.