Make this hand better

[larsjones]

This hand was the first hand of a rebuy tourney I played at a B&M here in LA. I, along with 3 other players rebought up front to bring our stacks to 2500. The other 6 folks were at 500.

I get dealt ATo in the CO. 2 calls to me, I call, button call, complete, check.

Flop A, T, 3 with two diamonds on board. I have no diamond. I bet 300 into a pot of 500.

button folds, SB calls, all others fold.

Turn is 5 [img]/images/graemlins/diamond.gif[/img]

SB moves all in.

To me, this was an obvious fold, since he made his draw(of whatever kind) there at the turn. How do I keep him from chasing? I bet 60% of the pot on the flop. Bet more? Should I just shove? Do I even want callers on the flop bet?

HELP!!!!!!!