1) Do they really make a difference to the car's looks?
DEFINITLY.. Look at pictures of the Xenon and the normal Light.. Not only at night, even at day the difference between the normal Daylight and the Xenon LED light ist really big.. The normal halogen light has a different daylight form. look at pictures, I would never buy an F20 without Xenon...
2) How Much more enhanced are the cars looks because of the Xenons? Are these really "must-haves"?
Yes they are. At Night the Xenon light is really good
3) Are there any other benefits for having Xenons? If you can mention all the benefits, it would be awesome
The lights at the back are also LED. They look very different, too
4) Most importantly, how will this affect my RFI date? My order was placed on 02-Aug-2012 and the current RFI is 21-Nov-2012? Are talking a few days, weeks or months more?
No Idea, but I don't think it will affect your RFI date