Young man, desperately seeking line

[JasonP530]

400 NL

Donk (450) raises to 8. MP(400), Villian(475, and tight) call, and I call with 65 of diamonds. The BB calls and I cover all.

Flop is A43 with the A4 of diamonds. Checked to villian, who bets $25 into a $40 pot. My move?

I think he will fold everything but a set, and maybe even two pair(I play tight too). If I raise to a decent amount(100), and he pushes(reraises essentially) I dont want to be calling all my money off with a draw, but I will prob have to, as I am 50/50. I don't really do the minraise, which will leave me enough room to push if he reraises, but i still have the same problem against his hand range. If I just call and he bets the turn, I am not going to know whether or not he just as AK/AQ, and can be blown off the pot or a set and cannot. I hate to play a big draw so passively, esp when he can see the flush draw, and half my straight outs bring a 4 straight to the board.

Jason