You need to have a sports exhaust to get the poppling and crackling really loud, but its noticable on the standard exhaust too.
The chilli pack gives the S aircon but not xenons. To get xenons you need to buy the visability pack (Xenons, heated washers and mirrors, lamp washers and other stuff I guess) or spec them as an individual option.
JCW kit is about £3500 as a dealer fit option. If your patient you can pick up various
JCW bits via ebay and the mini sites secondhand for good prices. For £1000 you can get more than
JCW power (220 instead of
JCW 210) from someone such as GTT or Lohen using similar parts but without the mark-up.
JCW seem also to have a bit of an issue on many cars of not hitting the 210bhp claimed figures.