I hate to be the bearer of bad news- I somehow don't believe William will take your wishes into consideration when choosing a wife!
Don't you think that after the "Diana problem", Clarence House and Buck House will ensure that William's wife is a little better prepared to face public life? And failing this, don't you think William, after what he's seen within his own family, will demand things be different for himself?
If we listen to Williams words (the only true thing we have to speculate upon), it seems unlikely that he will marry any time soon and even less likely that the woman be a European princess- he's said publicly how much he is attracted to and yearns for "normal life". Seems that all of his girlfriends so far have been regular girls next door.
Eliza