Best 8'' inline fan

Looking for the best 8'' inline fan on the market. These are the best two options I have found. And no, I don't want AC infinity.

We covered this in a PM but I will throw this out there for others.

I love the Vortex VTX series fans. I have a bunch of 10 and 12's, never had one die, some going on 8 years and I bought some of them used.

The fans you linked are the same type as the VTX (centrifugal), I have a hydrofarm one (the green one) in 8 inch that I got used on CL and it's been going for a good 6+ years. Bearings are the big factor IMO, good ones last a long time. I would skip the speed control on the Amerifan, as I mentioned in the PM a variac is far superior.

Centrifugal fans will have better CFM in a real world application where you have static pressure in excess of 1.75 inches of h2o.

Lets also add in that the variac (variable output auto transformer) speed controllers are what you need for these fans to run correctly at reduced speed.

The AmeiFan is a Tjierlund M-8 fan, they have slightly different output listed but price will vary, you may find one $20 cheaper on different days at Amazon.
I got one for $86 with a speed controller that I don't use, next day it was $126 again. A week later , it was $82 for 12 hours.
https://www.amazon.com/M-8-Line-Duct-Booster=Tjernlund M8

S&P TD Silent + optional variac

Very very very happy with the Vortex VTX 8''. I bet she could pull a golf ball through a garden hose.