NLCASH variance question

[Jiganti]

Your biggest buyin swings? (excluding tilt)
I pride myself in coping with tilt very very well, If I sense my play has deteriorated to the point where I don't have an edge, or my edge is very small, I know when to quit. I've had 10 buy-in swings from back to back battles with separate guys who caught the upper edge of variance. I'm a very aggressive player, and this results in a lot of big pots in my matches, and a lot of variance. I've played about 120k hands of heads up cash games, winning about 12bb/100. I was almost 20bb/100 over 40k hands at 200pl hold'em and moved up to 400, and 600 with a lot of success. Anyways, life story over. What kind of variance can I really expect if I continue to play NL cash games?