live br for 10/20

As of right now I am playing 5-10 limit with a br of around 1k and i am doing fairly well coming home with about 15-25 big bets. I am really getting sick of playing the 5-10 the players just suck, I know I can stick around and take their money but I want to get better not just stay the same limit.

What size of bankroll should I have if I want to play 10/20? Thanks.