im a psp owner and im a girl too..and is planning to buy one ndsi..
it depends on the games i think..
psp umds are quite expensive and nintendo games are cheaper..
imo, psp games are more into a beautiful type but ndsi games r more into cute type..

well, they both hv their own pros and cons, u cant really compare la~
but one thing i hv to tell is psp graphic is really very good

cool, can u tell me how's the ndsi after u buy n play wit it? im hopin to get one also