Honestly, if you lined up all of us, we would probably all tell you that we got the best one....LOL! Each of the major manufacturers builds a great product! All are a little unique from each other, and that's what makes it such a personal-opinion thing. My kit is the fixed suspension from Champion, and I have had absolutely no problems with it, and recommend it highly. A couple of specifics that might help us help you out......
- do you want independent suspension or fixed suspension?
- will you be riding solo or 2-up most of the time?
- do you want to install the kit yourself or do you want a shop to build it for you?
If you are going to take it to an installer, you may want to select the installer first -- the quality of installation is probably the most important thing! Not all the shops have contracts with all the trike manufacturers, so if you find a well-recommended installer, narrow your kit choice to the brands that installer works with.