Rob, there are many advantages to a system using RS-232. The most obvious is the source of an electrical signal vs. one comprised of light. The electrical signal is way more reliable since the device is connected like a right arm. The benefits of performance are there. With RS232 there is a very smooth and quick rhythm to the way the macro runs. You can cut valuable seconds off of Macros in most cases. Another factor is in most cases there are more commands and more features available with RS-232 than with IR. Instead of "Aspect Ratio" you may have a dozen different aspect ratio sizes. It is also cosmetically cleaner and more reliable than an emitter connection. Emitters fall off all the time; RS-232 is a plug. It provides a more professional look and feel. You should get into the habit of looking for RS-232 before IR.

With the MX-950 you will have to use another remote to learn the codes in that are discrete. Many people keep a cheap pronto on hand for this type of need.