I'm going to Paris next month, and it will be the first time for my wife. I've got plenty of places to try in the 5eme, 6eme, and 7eme. But since I figure we'll be doing some walking from Opera to Sacre Coeur and Montmartre, I was hoping to get some good recommendations there as well. Nothing to pricey, and it doesn't have to be a Michelin star place. Just some nice bistros with reasonable prices would be great. Thanks!