Well...this depends on what type of airplane you are flying. IMO, the computer radio is worth the extra money. It allows expo to be programmed, which is necessary when flying any 60''+ airplane. There are a lot of "goodies" on the computer radios that aren't on the non-comp. radios.

Now, depending on the airplane, and the amount of channels, the radio you have is probably fine. The computer radios are simply an easier, and IMO, a more fun way to go.

Enjoy,

Patrick