My .02...
I play the main line Be3. With b7 protected black is solid and the extra pawn makes for a rough endgame for white if black survives the middlegame. I have tried Qf2 and it is playable, I usually lose the initiative with the Qf2 line somewhere along the way which I don't want to do.
This is an old subject of debate for BDG players: what is the best move after Black takes the knight and plays c6?
I've tried playing all three. They all have their plusses and minuses. From a practical standpoint, White's win rate is quite good in all three lines--above 60%, though that doesn't convey how good White's chances are against the most critical Black defences. From a positional standpoint, is one better than the others?
Lately I've been trying out the Seidel Hall Attack. I was skeptical at first, but Scheerer likes it, and Stockfish seems to think White is fine after Qxd4 so, the very simple plan of ejecting the knight and ganging up on f7 if Black declines the second pawn is quite appealling. But I have yet to test this 'hari kiri' idea in a non-blitz game against a strong opponent. I only have engine suggestions, Scheerer's analysis, and De Bouver's analysis to go by.