You will be able to
do much more than you could with any $400 - $800 hand
held remote on market right now, and you can add all this
power to the urc-300 remote you currently own.
Like what? Let's assume he's a typical consumer (please correct me if I'm wrong dmathieu). A typical consumer these days has a display, cable/sat box, dvd, maybe an iPod plugged in via analogue and an AVR. What functionality are you providing that can't be accomplished via full command sets from a URC or RTI remote?