They say the Sony 590 has slow load times.
Pioneer 150 and 450 have fast load times.
They say Pio 150 has poor build quality --- noisy, with quirky behavior.
As for the Pio 450, I think I'm going to like the Marvell Qdeo chip, and build quality might be better than the 150. I've been waiting for comments for the 450, but it looks like I'll be waiting for Godot, considering the dearth of interest in BD players these days.