I agree, definitely worth buying.. As for the DLC, I have no idea.. Im still trying to beat the regular game. So many side quests!!!
The ending with the Dragon was a bit boring though. I felt like it was just a lot of walking back and forth. Go get this, wait, now go get that..
It got dull. I love the gameplay and graphics of Skyrim, but Obivion had a way better story. They need to mesh the two for the next version.