I have recently gotten up to date with 2 series, and I highly recommend both.
God of high school
This series is very young and from a Korean author. To sum it up, with the appearance of groups with supernatural powers nukes are becoming obsolete. The most powerful young fighters in the world are called to participate in a tournament, and the winner can have any wish granted.
The meaning behind it all has yet to be revealed, like I said it's a young series.
But look at this bad ass shit.
The second one is Last Exile Sunadokei no Tabibito
For anyone familiar with Last Exile, this is a direct sequel. Only 5 chapters so far but things are already getting interesting.