Whatever you get, you want a nice thick bottom. We got new pans from Costco when we installed out Viking 15K burners rangetop 8 years ago. Thinner bottomed pans, like my old Revereware, were a recipe for burning food.

Don't worry about a set, but get individual pieces as you need. And a couple of cheap non-stick fry pans, too. Don't waste money on fancy sets.

I've picked up a few pieces of Calphalon at their outlet store, and I really like their stuff.

The article at the link is wonderful to help you decide what you need. It'll take a bit of time to get through it all, but it'll be time well spent. Even if you retain only a fraction of it, you'll know more about cookware than the average kitchen department salesperson.

I think a 'set' is false economy; there will inevitably be an item or two that you never use. IMHO, better to decide what tasks you want to accomplish, then get the best tool for that task that you can afford.

But if you want a set, the Costco Kirkland stainless pots have gotten good reviews, and they're reasonably priced.

Here is a link that might be useful: understanding stovetop cookware