I'd 2nd rayatphonix's comment. Though an 'ideal' barrel length on the 25-06 may just be 24", the lighter weight of a Tikka T3 or the newer T3x might fit what you're wanting to do, as long as you can get by with the 22.4" barrel. After all, all you'd be losing velocity-wise is what, 25-50 fps? So what if the bullet is 'only' traveling 3200 fps instead of 3250? The deer won't be able to tell the difference. Also, in the synthetic stock model you have a rifle weighing in around 6.5 pounds. Add in another pound for the scope and rings and you have a fairly light-weight rifle that your daughter should have no problem carrying around. As for bullet availability, Nosler shows 11 different bullets as does Sierra. Speer 'only' shows 10, and that's just 3 different manufacturers. I'm not certain where you and your daughter will be hunting, nor, what animals you will be taking, but I've taken game from prairie dogs up to and including elk. (and BTW, both elk were 1 shot, DRT kills with a 120 partition) with my 2 25-06's. One is a first-year production model with over 3500 logged rounds through the barrel.
In short, I think the caliber selection is a good one. The main thing with all of this is to find a RIFLE that will fit your DAUGHTER. Once you find that, you have years of memory-making ahead of you. And each time she looks at 'her' rifle, she'll remember all of those times with Dad. It's one way to pay it forward and to always be certain you will stay alive 'forever'.