I have a suggestion on which one to pick
Both calibers are great. I have an idea, if possible why don't you and your father in law make a trip out to a local range. It will be a special time for both of you, and you shoot both. One will fit you better then the other, it is a weird thing but all rifles feel different. The one that just feels better for you will be the one to ask for. It may not be the one worth the most money wise, but you don't care. You will always be able to remember the time out at the range even if you don't shoot it alot after it becomes yours.