I'm guessing the only reason you've asked this question here in this forum is for some advice or consensus on who makes the best motors, or specializes in them for this sort of application. I also imagine that you've done some amount of web searches (like Yahoo, Dogpile, Google, etc) to find some. If not, please do so.
Personally I've found that most engineers, specifiers, and tech's feel that U.S. Motors, Baldor, and Leeson produce some of the highest quality motors that are widely available here in the U.S. You should really speak with a major motor sales and repair shop in your own area. If you don't know who that might be, ask electricians or electrical supply houses.