Just a few things to consider/compare when deciding on which brand to buy:
I'll use the brands already mentioned.
1. Does top hook have adjustable height? Speeco, Landpride, & Harbor Feight are. As Roy mention, the original JD I-match was not, but their new on is.
2. Is the top hook eye extended out rearward from the frame so the top link frame of implement does not hit the frame of QH when hooked? Speeco & Landpride have this. HF & from 1 picture I saw of one I-match the eye of hook is almost flush with backside of QH frame.
3. Is floating top link standard or option? Speeco's standard Cat 1 is. The Landpride, HF, and Speeco Economy it is not included.
4. Does it come with 1 set of Cat 1 to Cat 2 bushings? Landpride & Speeco standard model do. Speeco Economy & HF do not. No idea about JD I-match.
From that you should be able to decide what is important, what is not and compare prices accordingly. The Harbor freight is lowest price even adding in the floating top link and lower bushings but from what I have read on hear it is "crap shoot" whether or not the lower hooks are within Cat 1 specs.
Just FYI, TSC has the Speeco listed for $280.
Quick Hitch, Cat. 1 - 0267563 | Tractor Supply Company