Hand from $530 Super Sattelite

Last week I entered a $530 super satellite for the $5000 CA Poker Championship at Commerce. Players start out with 2k chips, and after about an hour, with blinds at 50 and 100, I'm down to around 1800. The table is aggressive with very little limping. Now, the hand:

UTG limps for 100, table folds to me in sb with 4,5os. I complete and bb checks.

Flop comes A,2,3 of hearts, giving me the nut straight. I bet 300 chips and utg raises to 1400, essentially putting me all in. He's new to the table and I haven't seen him play any hands. After debating, I call, figuring he's paired his A or has a good flush draw. I considered it unlikely that he had two hearts. Anyway, he turns over QJh to win. Should I have folded nut straight to his raise? I felt like I needed to start accumulating and it seemed like a good, though risky opportunity. So, hold'em or fold'em?