What carb should I choose?

[BEB]

I am having difficulty choosing a carb.

You all seem to have different opinions on whether a Double Pumper or a Vacuum Secondary is better.

Car/engine details:

AK 427 Cobra replica - 2600lb(1180kg)weight, 5 speed manual gearbox, 3.31 diff. It is used as a Street/Strip car.

409ci smallblock Chevy V8 (400 + .040), Dart Pro 1 aluminium heads, 2.02/1.60 valves, 23 degree valve angle, 200cc intake ports, 64cc combustion chambers, 10:1 CR, Edelbrock Performer RPM intake, 34 degrees total timing, 14 degrees at idle, MSD 6AL ignition, MSD Pro Billet 85551 non vac.adv. distributor, KB hypereutectic pistons, 15 Hg idle vacuum, Competition Cams XE268H-10 hydraulic cam - duration @.050=224/230 and duration @.006=268/280, Holley Blue Top electric fuel pump, 1 3/4" headers + sidepipes, Holley Powershot 14" air filter, NGK BCPR6EY-11 spark plugs (.045" gap). Max. RPM 6000.

On an English engine dyno it made 413 bhp and 503 lbft torque.

I've narrowed the choice down to the following:
1) Barry Grant Speed Demon 750 Vac. Sec. or 650 Double Pumper.
2) Edelbrock 650 AVS or 750 Performer.
3) Holley 700 Double Pumper.

What do you suggest and why?

Thanks Guys...