I always catch hell for this but whatever. Unless you are paying upwards of 2k, a strut and spring setup will perform better (and more consistantly) than cheapo coilovers.
With that said, most people just want a drop and don't care about performance. If that is the case, get whatever racer garage inc ebay wtfbbq coilover.
If you really want something nice, look at KW suspension.
http://www.kw-suspension.com/us/index.php
They make the real stuff, it's the bees knees.
They also have a child company called Suspension Techniques that makes kw stuff for cheaper:
http://www.stsuspensions.com/coilovers.php
FEAL suspension makes coilovers, and odi knows his stuff, I haven't seen much about them, but they're more budget friendly at 1400ish, but their fitment is only wrx.
You're also on a legacy, so options wont be as plentiful as a wrx setup.