I can’t say what is the BEST, because in all honesty it’s one of those questions you will get opinion after opinion on, and all will be different.
Personally, I have a Craftsman, Husky, and Snap On 1/2 inch that I use on a regular basis. I tend to use the Husky first (650ft lbs) and the Craftsman because most everything gets removed by those. The Snap On (1100 ft lbs) I break out when the other two fail. Yes, I could use the Snap On all the time, but I like knowing it’s my hard hitter of the two. My 3/8 Craftsman is a straight up go to and has never failed me on the smaller things that i just know the 1/2 inch impacts are just overkill for.
Now, my friend has a Harbor Freight 1/2 drive equal to my Husky, and even though we know the rep of HF tools, he’s had it for 4 years and it is still doing just fine.
I’ve been happy with all my IR, Snap On, and Husky air tools. It really is a user’s preferred choice. I’m also NOT an every day mechanic, so I would think it also depends on what you are going to be using the tools for.