I'd say that the answer aligns with whichever bullet you like the most in whichever cartridge you prefer.
I recently purchased a 7-08 with the intention of 162 Amax for whitetail - knowing I could also go 120/140 TTSX if I determined that the 162 wasn't going to do it for me.
I can't imagine any one of those 3 choices not working for you in a similar situation.
I also shoot the 105 out of my son's 243 and that's been nice so far. Larry has a pic of a darn nice bear taken with the same from a 6mm BR - it gets the job done.
Long/longer - chose the bullet you like seems to be the answer - the cartridge is a wash after that.
