Sequential Multiport EFI

Yeah summit wants $3600 for the Eddy ProFlo 2 setup but it includes absolutely everything for a 450 hp setup , Affordable want $2645 for a 1000cfm setup matched to my cam , both only seem to include 1 o2 sensor so I need to be able to add another , I get the impression that the guys at Affordable are putting together a setup of parts from different manufacturers to be able to offer a lower price but both use the RPM intake . I know it's a pretty hefty chunk of change compared to a carb but if it helps with fuel economy {lol kind of an oxymoron with a 524hp stroker but heh !} and most importantly cold weather starting and low rpm drivability then it might actually pay for itself in a couple of years , or at least make up the difference between it and a new Holley 950 with a choke circuit to replace the HP series I'm running now .