I am planning on purchasing an Ipad 2 in the near future. I have several documents saved on my PC which I would like to be able to transfer to the Ipad for editing and then back to the PC (and vice versa). I use MS Office on my PC. What is the best method to accomplish this? I have done some reading about programs like Google Docs and Dropbox and am wondering if this is the best method and how exactly this is done. Thanks