In the Cannondale computers the next model up from mine had the cadence function. I added ~$20.00 to the price. Unless it kept repeating "you are riding slow, you are riding slow" it wouldn't mean anything to me. I figure if I am still breathing and riding my heart is beating so I'll skip the heart monitor too. I know the racers and many recreational riders like the HR feature, I just don't feel like I need it for my base building riding. YMMV.
Bill