AVS2 800 carbs

I just watched the excellent video in the tech section on how to pick the right size carb.
Since I consider myself to be in the state of always learning, I'm now wondering if there is any downside to going with the AVS2 650 vs. the new AVS2 800.

I do have the 4.10 gears, about 2800 stall, Cope built 518, LD340 intake, the nice flowing heads, cam is the old Lunati 284 Bracket Master cam, 1-5/8 headers with 2-1/2" exhaust with Magnaflows. Weight is about 3300 lbs. Current 750 carb has crisp response.

That video would suggest I stay with the 650 to keep more velocity through the boosters. Do the annular boosters and AVS secondary change this advice any?
(I know 340's always seemed to do well with larger carbs...)

Just opening up the issue to see what other's experience is with 340 carb size.