i saw enslaved 2 weeks ago and it was awesome!
Their regular drummer Dirge Rep had messed up his feet or something so they had a session drummer who hardly knew any of the old stuff.. but who can complain, the new monumension is great. you really have something to look forward to..
All of their albums are good, there isn't a single weak album, and their latest is one of their best. Download a few of their songs before you go, so you know what to expect.