In terms of sound, durability/longevity/reliability, etc. Cherry Bomb, Walker/Dynomax, Purple Hornie, Jones, Magnaflow, Flowmaster. Yeah I know there's Borla, but they're expensive. My car is a 1996 ES300 (Camry V6) 1MZ with 2.25-in diameter exhaust. There are no bolt-on catbacks for the 1MZ engine. My exhaust has gotten loud due to an exhaust leak. It could be the resonator, or the stupid flex pipes again (oil leaking dissolved one of the braided pipes). I have not gotten a chance to look under the car yet.