I would agree. Ace In The Hole is his best film. Great performances, script, pacing, cinematography. It's all top notch. I just can't imagine anyone not liking it.

That being said, I think Sunset Blvd is a more artistic and daring film in just about every regard. It's not to everyone's taste, but neither is the best art. Sunset reminds me at times of gothic horror in the vein of Dracula, and I just love that about it, given its subject matter. Its characters are larger than life, it's conceit outlandish, and it's also one of the most stunning black and white films I've ever seen. It just could not be done in color.

In a way, if Ace is Spielberg, Sunset is Kubrick.