Most high end restaurants, wether the general public knows it or not, bake their steaks then sear them in the pan.
I am not sure what restaurants you are referring too, but all of the ones I have worked in and in the catering/banquets location I work in now, it is the other way around. They sear then oven finish....... Reasturants will usually only do that with medium well and well done unless it is a very thick cut of meat.
Reverse searing is really something new and not really used in the professional realm. However it is a very good method when done properly........ I use it a lot for Chef Tables and have some great results..... Here is what I do...
First I use a MES and
AMNPS or tube smoker.......
Set for a temp of 120-125
Get the pellets going and settled down....
Season with simple S&P or SPOG
Place the meat into the smoker. I usually try for at least 90min.....
When ready to serve, sear on a very hot grill or cast iron skillet.....
Allow to rest for a few minutes then enjoy.......
It is basically the smoker version of sous vide cooking. By raising the temp slowly the meat stays tender..... When I do tenderloin filet, NY Strip or a Manhatten Strip this way you can cut it with a fork it is so tender.
The challenge I see for you is temp control and clean smoke control with the BGE. The final cook pictures you have look great. I would not mind sitting down to a plate of that anytime......