Great thread, I'm in the same boat, but mine is 7 and I'm looking for the first rifle (I've been looking at the Crickets as well). She tried to shoot my 10/22, but it was just too big and heavy for her.
On the NEOS vs. P22 front, I think you made the right choice. I love my NEOS, but even with just the 4" barrel, the thing is heavy. I've been eyeing the P22's for a while because I think they are nice and lightweight. If you haven’t already, you may want to head over to rimfirecentral.com and look at the Walther section. They have good info for stuff you should do to the P22 to make it a nice reliable shooter.
http://www.rimfirecentral.com/forums/forumdisplay.php?f=48
On the NEOS vs. P22 front, I think you made the right choice. I love my NEOS, but even with just the 4" barrel, the thing is heavy. I've been eyeing the P22's for a while because I think they are nice and lightweight. If you haven’t already, you may want to head over to rimfirecentral.com and look at the Walther section. They have good info for stuff you should do to the P22 to make it a nice reliable shooter.
http://www.rimfirecentral.com/forums/forumdisplay.php?f=48