First of all, post this in the SNG forum.

Second of all the raise is too big if you are going to raise. The board is so dry so raising makes it look like you have an Ace. At the most I might minraise. If he has an Ace you're getting all the money in anyways, right? So why not then try to get as much out of 55-KK as possible all the while still stacking Ax on later streets.