Ah well, I think that no one will pick the third response anyway. As long as there is no one for whom 'hour' and 'tour' rhyme, it'll all work out.
Out of curiosity:
1) How do you pronounce the cycling race, 'Tour de France'?
2) How do you pronounce 'amour'?
3) Are there any 'our' words that rhyme with 'amour' for you?