did i see that car in the scooby net for sale section a little while back?
Good luck j-k and arron and welcome j-k and welcome back arron to the bottomless money pit of motorsport! (Make an accurate budget then double it!). Seriously i hope it all goes well for you.
I know the cars are very different and Arron knows his stuff but if you need another car to look at for an example of installation of cage, cut-out, fx etc let me know and i can bring the beemer along if it's useful.
Also Eta Motorsport that put the cage in for my bm only charged £150 for fitting the cage (WRX could well be more) and is in Gravesend - can give you details if you're not doing this yourselves? They're BMW race specialists, not Impreza rally but could be useful to you?
cheers,
Richard
PS would you be interested in talking about tow cars and trailers?