So I'm about to begin modding my bike. People do different things with their bikes but I notice that most people start with the exhaust. I get that impression that this is a good starting point since for the cash outlay, you get the most noticeable difference. So what then after that? I used to cycle and when I first upgraded my push bike, instead of upgrading the group set or wheels, I upgraded the contact points eg handlebars, bar tape, seat, etc. Would that same logic apply? That is, do people then proceed to upgrade their grips or levers? The current ones are fine but I don't have a point of reference for 'better' ones. Perhaps mirrors or lights? Aesthetically and functionally, nothing's wrong with them. Any suggestions?