Yes, You should always take the add-on, and you should be prepared in the begining to Rebuy if nessasary. The Reason for this is simple, more BB's, and when you start to dip into multiple inflection points, or if u hit a cold deck, then it might just be the push you need to survive. I always add-on no matter what, but if you were like chip leader, or in the top 5, you may have such a good lead that it's probabaly not nessasary. Also in the example above, you had almost 10 k in chips about double the average,--well if you don't add-on, and most everyone else does, well the average stack will be approaching your stack size soon, which in turn means that you might be forced to make moves sooner than you wanted. Good Luck!
--As long as we are lucky we attribute it to our smartness; our bad luck we give the gods credit for.--