I agree, the STi has a few styling issues for me too, I'm not keen on the blue seats (in anything other than a blue car), still not sure on gold wheels and think the the scoop is far too big! I've warmed to the spoiler though.
I paid over the odds for a spoiler at Scoobyclinic so I could get a 'free power run'. Despite saying they would do it when I got there, when I arrived they said the dyno was busy (no car on it while I was there though), they also said the same when I went back (3hr round trip) to get the spoiler fitted properly as it leaked, so i've not had chance to see what performance mine has. It felt quick the other day though