Has anyone commented on the performance differences between "dual" PB2's and a single B4+? I realize the PB2 is just "out of the oven"...but still fun to speculate. Assume you are pushing the B4+ with a Crown K2....I am starting to think that dual PB2's may have an advantage....am I wrong? I have done a search for this particular comparison...but came up short. Any words of wisdom.....TV?