You are hitting the nail on the head here. Your analysis is very similar to mine that lead me to pick up an M77 Hawkeye "Alaskan" stainless/laminate in .375 Ruger with a 23" barrel last December. You will have to pardon my nomenclature of that rifle (if incorrect), it is a slightly mysterious rifle and I cannot locate as much data as I usually can on it. "Alaskan" apparently can come in my configuration in addition to the Hogue stock and 20" barrel that is more common. The stock and the muzzle brake on the Guide Gun were not my favourite features, but may not have been dealbreakers, had I not found the rifle I bought. Med. bore options in stainless are rather limited after some research. Not at all trying to sound macho, but I do not see the need for the muzzle brake, even on the .375. The realistic number of shots on any given day (1-10) comes with an acceptable amount of recoil for me. The potential hearing damage to myself and those around me is more important to me. Since the stock is laminate, refinishing it with different colours is not an option, unfortunately. I was very tempted by the Guide Gun, but felt the features of the Alaskan were a better fit for me overall. I found mine at Prophet River and there were actually two in stock. I almost bought them both but decided to leave it to make someone else's day. Have a peek there or maybe even call to check on availability into the future. Have not seen available the laminate Alaskan with the 20" barrel, which may be the best of all worlds (see Unicorn). A Hogue 20" model and then swap out for a laminate stock may also be a consideration.
OP, the functionality of the guide gun is compelling. So much so that I seriously considered one in .375 Ruger. The only thing I was looking for which the guide gun had over my rifle was the barrel length. There would be an ease of handling in sudden moments or closer quarters with a shorter barrel. That said, I have not found mine to be overly cumbersome. If you see value in the muzzle brake and like the stock then it may be a great rifle for you. If you would be open to consider alternatives, have a look at the one I got, just to compare if nothing else.
Good luck!