In general, any Subaru forced induction engine can expect to need a rebuild between 100-150K or sooner if modded.
Front wheel bearings on anything but an '05+ STI fail somewhere along the line. Nissan bearing replacement with good grease lasts longer. 5MTs may fail if you beat them or last forever if you are nice to them.
Struts wear out.
If you plan for $1000/year maintenance above oil & such you are probably pretty well off when stuff goes wrong. They really are pretty damn reliable.