Welcome to the dork side, I mean dark side.
I'm not a huge fan of Evos, in fact, I will never ever own one just based on my own principles, but I do respect them when the owners are genuine car people, which you seem to be, and those are some very nice numbers you're putting down. Little low on the torque side of things, but that's to be expected with a 2.0L inline motor, still nothing to turn your nose up at though.
Anyways, some STI and WRX motors are prone to ringland failure, this is mainly due to a verified horrible factory tune, but there is also an issue with the parts themselves, which have since been changed out and are no longer an issue. Subaru was very good about replacing motors due to these issues, though like any car company they can be rather stringent about it. The only real bearing issues that Subaru's have a problem with are wheel bearings at about 80k miles or so. Spun bearings can happen on any motor pushed past where it was originally intended to go, or if oil delivery becomes a problem or the owner is neglectful, which is no fault of Subaru.
As for the leaking, that's a fallacy. I've not had one single "leak" from either of my WRX's and I've now had both of them past 90k miles, the only time I had a leak was when I didn't replace the oil drain plug gasket, but that will happen on any vehicle.
Ask away any questions you may have, the community is great and open and we will do our best to answer whatever questions you may have.