I think you should let her get what she wants. Never push a woman in her decisions. If she isn't happy with laptop you pick out you will never hear the end of it......that is if she even speaks to you at all.
My wife had to make an actual life or death decision and I backed away and let her make it because "life in a wheelchair" was a possibility and my wife was a very independent person. She would have hated me if I had talked into surgery that would have left her paralyzed.
Notice I am using past tense when I talk about her. She didn't make it but she was able to do for herself until the last few weeks of her life. I cared for her when it became a necessity to do so; but right up to the end she was her own girl.
Let the lady do as she pleases. If she is wrong you won't hear a peep out of her. She will grudgingly use the macbook in silence.
