I bought the Borla. It was a little too quiet and a tricky to fit under the rear bumper of my XT initially. After about 1000 miles it has gotten a little louder and "wakes up" a little more under full throttle. I also cut out the resonator, which made it a little louder, especially during compression braking. But it's still mellow and quiet while cruising, with no drone.
I had the Borla Hush on my WRX and love, love, loved it. More growl and rumble, but only 1 decible louder than stock and no drone.
Now I have an 07 OB XT and am looking for a similar exhaust with very little hwy drone in a wagon.
I've heard the Perrin and it is way too loud. From what I've heard the Invidia is loud also. The SPT is nice but $ and hard to find. The Magnaflow sounds fairly loud in YouTube clips, but it's hard to know if it's the camera. The Borla sounds good in YouTube clips but when I called Borla they couldn't give me any advice or decible reading.
Does anyone have the Borla on their Legacy wagon? Hopefully someone in Portland? I am reluctant to shell out ~$900 for the exhaust, shipping and install only to get something with too much drone.