I bought my IMCO's through Teague. I used him becuase he carried IMCO, Gil, CMI, Lightning so I figured I wouldn't get a recommendation on one because it's the only one they carry I like the looks of the CMI better, but they're more $$$$ Had my exhaust on for about 5 years now, no problem. Even blew a hose off my seawater pump and heated the engine up enough to bubble the powdercoat on the exhaust. Had them stripped and recoated, been going fine for 2 more years!
Craig