I know people like Shiny New Things, especially in an MMO- but seeing as (how I thought) Epic Gianthold was good, why not Epic Sharn Syndicate? The street battle was one of the most fun lowbie quests I've had. Or Epic Shan-To-Kor? Or even (the one no one plays anymore) Epic Restless Isles?
Of course you'd need to figure in balance issues and power creep, but seems like "more bang for buck".