Hi guys. Im back to Oblivion and I never played Shivering Isles. Is it good expansion? What about knights of the nine?
Also I have question about FPS- I have: AMD Sempron LE-1250, 2 GB DDR2 RAM, GeForce GT520 graphic card. I am playing on 1240x1024, without AA, texture Large, water detail Normal, reflection off, distant land on. I have 30-55 fps. Is it good for my spec (I think yes ) or I need some mods to optimize fps?

If you're wanting it to run smoother, then more Ram would be good. Also dunno what processor you have.

Shivering Isles is a very big expansion pack, full of lots of quests, new monsters, new people, new lands. It has the entire package! Personally, I haven't explored much of it, but I wish I had the time to do so!

Knights of the Nine is a long linear campaign, and it is a very decent one. Although it doesn't add a new Worldmass, it does add a few new quest-related dungeons, plus some brilliant Paladin armour. The quest is long, even longer if you roleplay (no-fast travel) and the rewards are pretty awesome. Including the final fight! I'd reccomend getting both.

Ok. I have shivering isles im curious about knight of the nine. Anyway personaly I think that graphic card is most important for fps- 2gb ram is pretty enough but gt520 is kinda bad (1gb but slow performance). Procesor is 2.2 ghz single-core but it is good for oblivion I think.