Underappreciated Magic Sets

First off let me give a shout out to the most recent set...Khans of Tarkir. This set promises much. It's got some great new material and reprints that make it all the more worthwhile. Secondly, I'd like to give a shout out to the Duel Decks that have been produced. How many times have you just asked yourself...Can I get 2 Magic the Gathering decks that matchup well? That's what Duel Decks do...they simply matchup well against each other. Not to mention they are stock full of staple cards. Big thanks for the most recent sets and Duel Decks