(120mm) Low Speed Panaflo or Medium Speed Yate-Loon?

so as the title says, which of these two is the best for use on a double heatercore ('77 bonneville w/ac)? i am aiming for this setup to be dead silent at 7V.

if there are any better fans than these two, feel free to point them out.

and i live in Los Angeles, so can anyone also tell me the best place to buy these fans online? thanks a bunch.

anyone?

I don't have any experience with Yate-Loon, but I do own 2 120mm Panaflo high's. The high's are very-very quiet at 5/7v. So the Medium/Low 120's should be dead silent when undervolting. Another thing to consider, how deep are the Yate-Loon's? I know the Panaflo 120's are usually 38mm thick, and generally thicker fans produce more pressure.