For C4, I would go with the Engineering Solutions RS232 to DMX box. It only requires 1 RS232 port and the module does all of the heavy lifting when it comes to sending out commands to your light strips. This solution is much better than the Entec/Extra Veg offering, trust me. No popcorn effect during lighting scenes, dimming all the way down to 0% and each light strip becomes a virtual dimmer making it easier on you in the end. Barely any processor overload too.

Jackstone (Jerome) is the user you would look for in the forums. Look for his posts on the dealer forums or c4forums.com.

The only thing I would suggest is to make sure you have done proper calculations for a power supply and don't use cheap Chinese LED drivers (if using strip lighting). This solution is much more inexpensive, especially if you are able to easily run the wiring.