I don't want to swell any heads so here is my list:
Marine Kinetics
Teague Custom Marine
Bam Marine
Young Performance Marine
Hardin Marine
Victory Marine
CP Performance

No particular order except for the first one

I found OSO after I bought my second boat.... 241 liberator with twin cobras that needed a transom, floor, and much more. The advice and information found here is truly priceless. If you need to buy some parts or sell some parts, figure out which prop is best, whatever you need there is no better source around! I bought DrPete's Baja 240 islander before I knew he was on OSO ( I guess I partially paid for his outerlimits so I deserve a ride eh Pete?) BajaBrian contacted me when he was moving from OK to Denver and needed a place to keep his boat for a few months, since then we have become very good friends and help each other on our new boats all the time.
Probably my best dealing with OSO was when I found a guy in Ma selling some camper jacks That I really needed for a truck camper, but he wasn't willing to deal with shipping them to me in Colorado........I mean he wouldn't even just drop them off at fedex on my account. So I started a thread looking for help, and Masi242 stepped up, drove an hour to the guys house, picked them up, took them home and wrapped them in cardboard and then dropped them off at fedex for me!! then he wouldn't even let me pay him! (finally said I could send him a home depot gift card or something) Guy I have never met really helped me out in a pinch.......Now thats what OSO is all about. GlassDave has helped me with advice, 4Bus and Biggus with 575sci info, countless sales and purchases. I am sure there are many more I have forgotten.
Good Thread MT, and Thanks OSO for everything!

Having a Magnum and Cigarette looking at both of the forms look at the Magnum form. No ball busting, drama, just people with cool old boats sharing information and pictures. Classic boats with Classic Guys. Pretty bad when you look at the Cigarette form and the teaser BS is going to pass the "Lets see them pictures of Cigarette Boats" at the rate of post. Makes Cigarette guys look like D-bags......