Holley has a new Cheap dominator on summits web site

Pulled up summit the other day and on the first page is a photo of a new holley dominator carburetor .The call it SP for sportsman I guess .I believe they have a 1050 and 1150 cfm .Along with two and three circuit versions .Pricing $719 or there abouts .Looks promising to me I spoke with a couple of guys at Barnett Performance in ATL. They say a three circuit is better than a two circuit .What do you all think ? What is the difference I am unfamiliar with dominators .Doug