Mike...you're too cynical (or maybe that's just experience talking). The handful of EJ22T's I've used never failed me! Well....except for the crank-walk on one (sold it as bare case halves), broken ringlands (JC sold me some replacement pistons), and maybe a head gasket issue after 200K miles on a third.
To the OP: Your '00 is a Phase 2 setup - heads/harness/etc. so as MT stated wiring will be another issue (besides refreshing>rebuilding the EJ22T).
For a little more money you can get a used EJ205 or even EJ20G which will have many more parts readily available. That early 90s Legacy SS engine is pretty rare and will only get harder to find stuff for as its nearly 15 years older than the newest EJ205.
Gotta root for the 22t, not because I just picked one up myself, but because they have a reputation for being long lasting and reliable. As far as parts availability, all you want is the bottom end so the heads are gonna be as rare or common as you choose. Aftermarket pistons and rods are readily available, and bearings are the same as other phase 1's.
As far as what you'd have to do... Well it'll be virtually the same as a WRX swap with different wiring diagrams and some other small differences so I'd say read up in the technical section bud. All the answers are there. Do you know anything about swapping motors already or are you starting from square one?