Don't fork out your dough unless your ear, not the sales rep's, can actually hear the improvement. Take, for example, this recent exchange I had with a PR guy, as we sat in a tricked-out, neon-everywhere SUV for a product demo. Nodding his head rhythmically, he lifted his finger at some allegedly critical
element of the bass-heavy hip-hop trance thingy. Him: "Hear that?" Me: "No." Him: "Hear that?" Me: "No." Him, again with the finger: "How about that?" Me: "No."