Giving QF my specs listed below, I wanted the SS-650-AN DP and they talked me into the SS-750-AN DP instead which is actually 735cfm. I am glad they did and I love the throttle response of this DP. You will need to tune it like anything else but everything on it is adjustable.
If you order directly from QF, you can choose your anodize colors. Instead of the standard red, I chose the black anodize and it looks great in those colors.