I am no fan of IFS on any of these cars, because the factory Mopar suspension can do a LOT like it is, if everything is in good condition and set up correctly.
That said, if I were to go with one, it would be the HDK. None of the others you mentioned has representatives on this site.....or if they do, they are non participants.
With the HDK system, you have the owner hisself right here on forum who participates on a REAL regular basis to answer questions and provide help if needed. Customer service would be my first concern and Denny has that covered, not to mention he builds a nice product.
That should mean a lot coming from someone who'll probably never use one.
