I've been using the $70 10 gallon pot from Austin Homebrew, and it's great. It's thin steel, but it IS stainless. My burner is insanely hot (5 gallons to boil in 7 minutes) and I've never scorched wort on the bottom.
If you want restaurant quality (1/8" walls), you'll be looking at several hundred bucks.
>>Proudly brewing the beer I drink since 1989<<