The ipad 2 has just come out and im saving money for it (have about 200) but should I wait for the ipad 3 to come out when I get enough or buy the ipad2 when I get enough.
Since there is no release date or announced feature set for the iPad 3 any definitive answer will be based on speculation.
Wait until you have finished saving. See if the iPad 2 will fit your needs.
Then see how long it will be until the iPad 3 is released (until we hear otherwise, we can probably assume it will be out Spring 2012) and then worry about if it is worth waiting or not.