GTD study

My ideal GTD software, There should be below some features. sub task mail input support friendly interface sync with cellphone? work and private separation interface Currently try software of RTM, Astrid, My device history for GTD hardware Since 2002 year my first job from Toray, I have Palm S10, Sony Clie TJ37, Treo 650 HTC Cruise HTC desire Sony Xperia Ray Except hand write notebook.