Im surprised no one has mentioned "Skywalker", it is a more rare strain but it is supposedly one of the best and strongest indicas ever created, marijuana-seeds.nl has it, it is a cross between Mazar and blueberry, both very potent indicas, im thinking of growing it outdoors next year, it caught my attention because ive wanted to grow blueberry, and ive grown Mazar with terrific results...anyways, just my suggestion...