I'm afraid that a certain amount of game camera stutter is normal with the highest end cards like yours. The extent to which it can be tolerated is of course up to the player. If you feel that it's really detracting from enjoyment of the game and not a minor thing, perhaps you could post a short video that demonstrates what you are seeing?
The slow to load graphics might be a caching issue or perhaps you have "too many" (more than 2 or 4) high detail lots selected in Game Options. You already have like 10x more texture memory available than the game can really use due to its limited programming, so this is going to be difficult to improve upon.