Personally, I would prefer some type of Liquid Mic'ing or Liquid Cab where we can move the mic around virtually and apply different mics. I would not be surprised if Kemper is looking into this. I have enough effects on Kemper, Plugins, and Pedals to get what I need ATM.
I had this with Roland technology around 1999. (Moving /changing mics) It got to be where I could just EQ and get similar results.
If you used an SM57 with an API pre or a U87 with an inexpensive board pre, the 57 will win normally so mics only do so much, the pre is more important IMO. Many profile packs utilize different mics moving around, I'd just pick one that sounds good and go.