Should I get the new Explosions in the Sky album?
It's a decent album, but there are much better Post-Rock releases from 2011.
If you haven't checked these out, I would recommend the following before getting EiTs:
Mogwai - Hardcore Will Never Die But You Will
Maybeshewill - I Was Here For A Moment, Then I Was Gone
Vessels - Helioscope
This Will Destroy You - Tunnel Blanket
Codes In the Clouds - As the Spirit Wanes
And So I Watch You From Afar - Gangs