I’m pro reverse sear, similar to your bring it up to 100 and then get grill roaring hot and sear each side until temp is 118-120. Wife and I like rare to medium rare steak. However, I now do it sous vide for 2-2.5 hours at 123 in a vacuum sealed bag, then sear on grill or cast iron.
I prefer charcoal grill (Weber kettle is what I use) as it gives a preferable flavor and doesn’t turn on my smoke alarm when it’s too hot to open windows. It also is important to make sure you have a nice marbled steak. Also, a relatively inexpensive cut is skirt or flap steak. Don’t usually need to sous vide those, can just throw on hot grill and cook until about 115-120 in center. Highly recommend a Thermapen to get accurate reading.
I understood none of this. I can only afford hamburger helper.