Great cars,..my twin bro has a 05 WRX....The STi is faster for sure,..and you can make the WRX just as fast as a stock STi but you will be about maxed out with the stock turbo to reach that. The Sti can be made much faster. The 2.5 makes a big difference along with the STIs better turbo. No real need to worry about the engine if it was taken care of. 60K is not bad at all for the engine. The stock turbo will go eventually like every turbo car,.my bro's WRX turbo went with about 100K on it. But they are not expensive to buy used. And changing the turbos out was not that hard of a job.
Cons: Gas Price and Mileage,..o and the unstoppable urge to step on it to feel the turbo spool up.
Pros: Sick sounding car, And a smile every time you put your foot down. And the availability of good hp increases with every mod you do. AWD which always surprises me and leaves me searching for its limit. Haven't found it and I dare not to try any harder.
Its a great car...and the cars fans base is amazing and very knowledgeable. I've never seen a car community so serious about their cars.