Read this post you made again. You know what the issue is. My point is your fix isn't a fix.
Screw it. I'll type it out again.
You have an air flow AND a coolant flow issue. A fan change won't move the needle.
You need to look at your pulley sizing first. The water pump and the crank need to be turning the same speed (1:1) at least. If it's not 1:1 you need to correct that first.
If you are under driven, which I suspect you are the fan and the water pump are turning less than crank speed.
Like I said, you can change the fan to anything you want, but if the pump and the fan are turning too slow it won't matter.