Both Anadolou and Istanbul Cafe are suppose to be owned by the same people. I've been to Istanbul Cafe (mostly for lunch) and liked it very much (though that's over a year ago). Some of their lunch menu is very different from the Sultan's Kitchen, so it's possible to get a good sampling of dishes if you've been to both. I also remember it being very reasonable, especially for Beacon Hill. Let us know what you decided and give us a report.