The Demeyere Atlantis/Proline is stellar. I recently upgraded to them from my All-Clad D3 and Copper Core pots and pans, and, especially on induction, the Demeyere really shines. The Atlantis/Proline is going to have about the best thermal performance and warp resistance of any stainless cookware (but at the expense of weight and price.)

If you are looking for a moderately priced set, the Demeyere Industry is one step below the Atlantis, but still uses quite a bit of aluminum and will outperform most other clad pots and pans.

The All-Clad D3 is even more affordable than the Industry. The D3 is great, although it would not have the thermal performance or warp resistance of the Industry.

It is possible to someones find both All-Clad and Demeyere on sale, usually in the ballpark of 10-15% off from retailers, and sometimes more if the maker puts a specific item on a sale. AC factory seconds can sometimes be a great value as well.

Finally, if the budget is really tight, these are good products to either, A) buy only one or two pieces at a time, or B) by used.