Even I am a MS Pocket PC user, I think Palm PDA maybe better for her for simplicity and longer battery life (unless she is very familar w/ Windows and want to have a similar experiencee). WM2003 is highly not recommend as data will lost as you forget to charge the battery. No matter what, bring her to try both Palm and WM5 PDA and let she choose what she like.
My SE X1 rom-> http://forum.xda-developers.com/forumdisplay.php?f=471