If you're replaying Oblivion...
you need to install Nehrim...NOW.
http://www.nehrim.de/indexEV.html
I've logged 80 hours in this and I just finished the main questline. It's legit better than Oblivion. It's all in german, but there are english subtitles (most of the in-game text is english, too) and quite frankly, the game didn't suffer for it.