not worth upgrading to the king headset, if you're running it fixed dont bother with a rear brake, and the aluminum argument has been run to the ground but i find my jamie roy to have far less road vibration than many steel track bikes due to its geometry, dont be concerned about that. pedals i'd get some mks gr9's with some sort of foot retention, i like the soma double gate toe clips, but you can also do clipless like someone suggested.