Lead for 2.00. Enough to entice some action, hopefully a raise. But there are other times to check a set. Against standard TAggs who raise pre-flop, in a heads-up pot, OOP, it is standard to check because they will c-bet most flops hit or miss, but may just fold if you lead. I lead into larger fields, more aggressive players, or on ace high flops, but I still check at least 1/3 of my sets I would guess.