Buhler, Bush Hog, Rhino, Woods all make good loaders. All are probably somewhat lower priced than the NH loader too. Some may have slightly more capacity, some may have slightly less than the NH loader.
Now which is the best for you?
If money is your main concern, buy the cheapest one. All will lift a buckload of whatever you put in the bucket.
If you want the advantages of the curved arms, with its clearly superior visibility, then choice is also obvious, go with the NH loader. Those of us who have both, or used both, typically prefer the curved arm loaders, but even those of us who prefer the curved arm loaders admit that any loader is better than a bucket & a shovel
I prefer the NH loader. I believe that I am more productive with the added visibility and I believe that I can work faster and more accurately with the added visibility. I've proven it to myself and typcially choose my smaller NH for loader work over the larger Kubota. I'm not sure I can prove it is more productive to others. But on commercial loaders you will notice that they typically have very low profile loader arms to increase visibility.
Just a note of warning, when comparing "capacities" of loaders you need to compare the proper measurement points. Pivot point measurements are going to rate a loader higher than bucket center or bucket lip measurements.
Further aftermarket loaders typcially specify a hydraulic flow rate/psi at which their capacity is rated, not all tractors are capable of putting out that hydraulic flow and thus the ratings may be accurate on one tractor but inflated for another. If the tractor is has an output higher than the loader's rating, be aware that the loader will not have a corresponding increase in capacity as it will typically have a pressure regulator in the valving to prevent damage to the loader's hydraulic hoses, est.