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Harley floating rotors list for $140/each, and can be had for 20% off nearly everywhere. I've got the ones with black centers, they look and work great.
I've never met anyone who didn't "need" better brakes.....Best of luck to you.
The floating rotor has a separate hub piece and friction surface. The friction surface "floats" on the hub via the rivets (or whatever they use) that it's attached with. The two big benefits are better heat properties (the friction surface can move independently, and the hub area doesn't get as hot), and less brake squeal and pulsation.