For me the interest of this projects, is to build it myself. A kit sounds perfect. Personally i have no interest for a fpga system, if i want that i can always buy a raspberry pi. I also am not interested on the x8, and i believe it would dilute the project by offering too many programming options. The case sounds like a lot of problems for little rewards, being an atx motherboard it would be easy to let the user buy a small case to fit the board. If you plan on offering a fpga solution down the line i hope you will still offer the kit solution as an option. Wishing you the best for the succes of the commander x16 kit option!