Which Landpride? I think they make light, medium and heavy duty units. The heavier duty models are more expensive and might be more than you need.
The best thing to do is to look at the specs on different units. Look at how heavy it is, how thick the side plates are, look at how it connects to the lower links (captured pins are much better). Once you've decided which models will fit your needs, shop around for them.
I ended up with a Bush Hog BB720. Bush Hog considers it a light duty model but it is heavier and uses thicker steel than most of the KK, Howse, etc brands that you see at places like TSC. A KK or Howse might suit your needs perfectly but I wanted something a little beefier. The Bush Hog that I bought had been sitting on the lot a while and I got it for around $650 (I'm a bargain hunter). I use a 4wd 45hp tractor and I've done some pretty significant earth moving, I've hit a lot of buried stumps and rocks and I've done a good bit of pushing in reverse and it has held up well. Nothing bent, no broken scarifiers. JD, Landpride and several others make boxes with very similar specs that would do just as well or better. Shop for the best price.
Also, some BBs come with a hinged rear plate. This adds considerably to the price so decide if you need that feature or not. I didn't need it.