The problem with pushing is you will rarely/never get called by a hand you're ahead of. Depending on the player I will sometimes pump it to $60 (with the intention of pushing the turn if called) or I may just call and see a cheap turn card. Against a player like the one you explained I think calling is the best play on the flop. There is no way a tight player like this one is calling with less than a set, unless he limped with a big pair.