Hi - just ordered my Model S 100D!! I'm so excited.. It'll be Blue, Creame, with the 19" Sonic Carbon Slipstream wheels. I'm looking at purchasing a set of 21" wheels and found the following options: 1. BBS UP-01 2. Arachnid (only available on P100D, or second hand) 3. Twin Turbine For BBS UP-01, there isn't any weight posted -- does anyone know if this performs well, how much it weighs? It says it was designed with the weight focused on the centre to reduce rotational mass. Based on my research, I believe the Arachnid wheels are forged and better/lighter than the Twin Turbine ones. How do you think the BBS wheels stack up against Arachnids? Other alternatives? Thank you!