I'm about to pull the trigger on either an Omega or the Aurora Ltd. (Am not considering the Atlas because it has a much higher standover height.) What are the advantages of the Omega over the Aurora that justify the higher price? The only ones I can see are (1) extra 10 nm of torque, (2) 7 lb lighter, (3) slightly higher battery ah. None of those factors matter to me. I like that the Aurora has a rear rack, which I definitely will need. (But the Aurora has a higher stepover height, which is significant to me.) You can buy a rack for the Omega, but for an eye-watering $150. Are there any quality after-market racks available that will fit the Omega? I'm excluding rear racks that attach to the seat post because I will likely have the seat height all the way down to its lowest position.