i've been in a 04 (approx) WRX with STi bits and a remap and it went like stink. but before the remap it wasnt that quick to be honest.
the WRX brakes arent exactly amazing especially when the power has been upped.
beware, that that WRC will be £415 to tax next year and £430 after that (hence why alot of people are selling them and why the values have been hit)