I have had a 4.5, 5, 6 qt. KA and a 7qt Cuisinart. I really don't like the Cuisinart performance: it's tall and doesn't fit under my upper cabinets to lift the bowl; the bowl only has two small handles on the top, making it hard to hold with one hand and scrape out with the other; I have disengaged the bowl with just a bit of pressure doing a scrape down; same thing with the beater, i have disengaged it with a small bump; the paddle will clump dry ingredients to it when i used it on a mix or during reverse creaming; while the bowl is technically a 7qt, the top of the beater is located 1.5" below the top of the bowl, so i really don't know what the extra inch of bowl is good for; and when using the 'to the top of the bowl and bury the beater' technique of making American buttercream, it always gave me buttercream with bubbles in it. But my #1 problem with it was that i missed the very efficient mixing action of the KA. It is what I know, and especially making scratch cakes, I go by how things look and sound in the bowl. If I had cut my teeth on a Cuisinart, I would probably like that, or if I had to have had a commercial mixer I would have to get used to it. But as much as I really, really, really wanted to find something other than a KA, but i am a KA fan through and through. (i've also resigned to the fact that i'm going to have to buy a new one every so often; maybe the KA 7 qt will be next?) I bring out the Cuisninart when I am making buttercream and don't want to over heat my KA.
I think that unless she has a preference for a mixer with commercial capabilities, then you really won't go wrong with a KA in her favorite color.