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: 2002 Focus SVT: 142k, Sonic Blue, #1654, All Options
Mods: Tom's Tune, Borla, HFC, STS, Painted Machs, Euro Grill, FRPP Springs
Hers: 2010 Focus SES: 67k, Ebony, Auto, Moon and Tune