First of all, I've also read shayboarder's reviews on the yes boards and I have to say that I completely disagree with them. I own a Big City and a Pick your Line and I've found them more forgiving than the NS boards I've ridden (Proto and Heritage).
If you're looking for speed, I wouldn't go for the Big City but for the Pick your Line. The Big City is more of a freestyle stick that is good for freeriding while the PYL is a total speed machine that is damp and insanely good in powder. I prefer the YES camber profile over the NS but I haven't ridden the Premier F1. All I can say is that the PYL is the best freeride board I've ever had. It's super stable, responsive but still playful. The only thing I would improve is the pop. It's not a freestyle machine.