I do this all the time. I also save an extra seat every time I go to the movies, any sports events, etc. And if other people try to sit in the seat I shove them away and yell at them for "crushing him!!" and then proceed to apologize profusely to the empty seat.
I watched all the episodes that I could find (they stopped a little too short for me though), but the anime ended before the manga, so now I'm following the manga (which is incredible!!!) However, the writer is sick (I REALLY HOPE THEY GET BETTER) so they've had to slow down the process from a chapter a week to a chapter a month!!
I HATE dubbed versions. The voices just plain suck. Like as much as I don't like subtitles, I just cannot STAND those crappy voice overs... D: And the anime follows the manga pretty well, so you can probably start reading from wherever.