All the pumps mentioned above are good pumps, but each one has its good and bad.
The Iwakis are high head pumps, with the 1 you mentioned you can have a head of 60'+
the Blulines are a clone of the Iwaki, with their own twist.
Panworld is the same exact copy of the blueline.
Every pump has a curve and power draw, and head height. And warranty differs quite a lot.
depending on how much you want to spend, and how quite you want it will determine the pump for you.
It is very easy to say get a mag, or get a Eheim, or etc.
let me give you an example. Mag 18 vs a Blueline 70.
They both can move 1800gph.
Mag 20' head Blueline 39' head
Mag 145 w Blueline 290 w
Mag $170.00 Blueline 250.00
So far so good right.
well here is the kicker,
Mag generates a lot of heat and Blueline doesn't.
Mag runs very quite, but the blueline uses a fan to keep it cool so its a bit noisy.
You have a ton of choices this is just 2, I can add 4 more models with the same gph at 0' of head.
I hope I didn't confuse you all.
But the decision comes down to what is best for you, If the pump is in the basement than you don't have to worry about noise. but with that comes head height, and price.