I agree with lewis010. Even though the .10 rebuy tourney is a lot harder to cash, the reward is much greater. And it gives you 19 different chances (min) if you don't add on with the 1.90. My second option would be trying a $1+.25 sit&go, and try to win the 1st place $4 prize, and just moving up from there.
Once I turned $2 into $100 (the dream of every low money player, right?) You just need a lot of patience and persistence.