Aero hump or no aero hump? Do you ride on the street, do any track days or are you the hardcore weekend warrior and race? If you ride on the street, the aero hump may be an issue if you ride with a passenger as it can prevent them from holding onto you effectively; otherwise it is a great safety feature. Aero humps are not necessary for track days, as most riders use track days for pure recreation and a back protector will suffice just fine. For the weekend warrior who races, aero humps are absolutely necessary!
Back protector? Never leave home without one; worth their weight in gold! Back protectors are highly overlooked by street riders, but will save your life. Make it a habit to wear one as they do protect your spine to a very high degree.
Zippers matter so look for genuine YKK zippers; stainless steel and nylon based are usually the gold standard.
