Hi Chris,
have started JT-modes a year ago (meanwhile back on CW). I´ve used only WSJT-X. The reason was that you can operate JT65A and JT9 with one software and it work´s perfect together with JT-Alert and JT-Macros from VK3AMA.
B.t.w. i think you not reach the 50 US states for the WAS or more than 200 DXCC´s for the DXCC. Only the same guys on the way with those modes and no "rare" states or entities. It´s an efficient mode for QRP´ers but .......