The RB8 and E20 look to be the most elegant solutions to the step nose. Ferraris may be so extreme because they're using a pull rod front. Sounds daring... Time will tell.
Macca today said the car they unveiled isn't what it will look like at the first test, let alone Melbourne. They're still trying to hide some stuff.
Interestingly, from what I can tell, Sauber is the only team that's allowed their diffuser to be photographed. Wonder if it's the real diffuser and they just don't care, or it's a fake?