Uhhh, Probably anything that fits your car's year, make and
Seriously though. That chassis (GD) has been used from 01-07 and 3 different front ends were made during those years. 04/05 were the only years of that "blob eye" front end. You should do more research as to when Subaru made face lifts (and what those face lifts entailed) before setting out on "looking to change a few things" because this is very rudimentary and broad stuff your asking.
The year is more important than trim / model. If the rear bumper is from before 04 then you will run into issues as the rear lights changed in 04 as did the bumper slightly to accommodate them. Little details like that are why it's important to be more specific when asking things.