If I had to replace my rear the Greg Davis bumper would be my first choice

 

Looks great. Nice lines. My only concern is the winch height. The height is going to magnify the stress that the frame to bumper bolts will see. When you use the winch, it is going to want to twist the bumper down toward the ground. This is why most aftermarket bumpers have the winch mounted lower. See if your PhD engineer buddy can do some calculations to see if it is OK.

 

Beautiful looking bumper. Very rockstar fab-ish. I like the tube look but I also favor the rte fab slimline look so I made this up, it's a work in progress but I must say that I like yours much much better sir!