you are best off with a STI or a swaped WRX....to make a WRX quick, and reliable....you'll just be adding more and more STi parts to it. STi can take 10x more punishment than a WRX. Get a STi and save yourself lots of trbl and money. WRX will be a good car if you want a quick daily car, and keep the mods on low side. Hit any of the Suby guys if you any questions.
P.S see the one in my sig...it's for sale.