I bought mine from Daniel stern lighting as shown in the link I posted. I just emailed him giving him all the details about my car including the current stock bulb type. I rarely give bulb recommendations because it is so subjective but these bulbs are excellent.
However two things. The STI with it's HID low beams and Stock high beams is pretty powerful and I doubt an STI owner would see a difference (they may but I don't know). Secondly I cant make any statement about longevity because I have had them for only 3 months.