why do you think his bet indicates strength? 2 pair or set???? He could simply have an Ace and be testing you to see if you had a middlish pair. That being said, you may still want to proceed with caution. I would throw out a reraise (not 400-500, maybe 240))and see how he responds, if he pushes or re-reraises then I may consider letting go of the hand. More times than not, i go broke though.

You said early in a tourny, what kind of tourney? Micro's = donkfest.