I have needed to replace a cheap, thin aluminum stockpot that someone gave me for decades. My challenges were I always wanted an expensive one, but couldn't rationalize spending the money for a stockpot. As others have stated, I saute items in 15" cast iron skillet first and transfer to a stock pot when adding the liquids.
After I scorched the bottom of a batch of soup a few weeks ago while simmering about as low as I could, that was enough. After some research, purchased a Cuisinart 77-412 Chef's Classic Stainless 4-Piece 12-Quart Pasta/Steamer Set for $49. Why did I wait over $30 to replace that terrible stockpot? Yes, I'm sure the All-Clad BD55512 D5 Brushed 18/10 Stainless Steel 5-Ply Bonded 12 quart Stock Pot is fabulous, but I can manage just fine with this Cuisinart for $49 vs. $400 for my needs.
If anyone needs an affordable stock pot, the build quality seems to far exceeds it's low price.