First, one thing to remind that till your enrollment, if you are admited this year, it will be nearly 4-year work experience, which is enough for all MBA programs.
Secondly, you don't have to mention your future career change, if you are doubt of the side-effect on your applications.
Also, you have said your current job is "endless and boring"; then, how is it coming that you can "enjoy life for a year"?
More, if you familiarize yousefl the application game this year, your chance to get in a top school will be better. My two cents. | 
