I feel obligated to flag that at that price scale, just.doinf one of the GR kits might be better. The cost of a mini with a premade cabinet is pretty close to what resale on the Klipsch plus the upgrade kit would be. Since the crossover is a lot of the work on a kit if you don't have to touch the cabinet, the effort is similar.
No judgement or anything, I'm just wonder if the existence of the cheaper kit without requiring any effort on the cabinet changes the math for a number of folks.