Borla. I love mine, the deep tone just can't be beat. I have the true Borla version (not Trubenz) that has the resonator and muffler. My only complaint is that I'd like it to be just a bit louder, so I might go HFC or ORP eventually.
Mine: 2004 Subaru WRX Wagon: 116k, WRB
Gone: 2002 SVT, #1654
Hers: 2012 Focus Ti Sedan: 67k, SGM, Manual