I recently looked at both the STi and the EVO as a replacement vehicle.

I decided to keep the ITR and use an EP3 for daily transport.

Although both cars are big steps up from the ITR, performance wise, neither of them seemed to offer enough of a performance advantage to be worth dumping the ITR.

The EVO driving experience is a little more raw and a little more like the ITR experience than the STi is.

However, I've heard a couple of knowledgeable people say that they'd buy the STi instead, simply because of Subaru's reliability record and warranty experience.