One of the best dado set for the money on the market is the SD206 from Freud.
The Pro Dado Sets incorporate quality and craftsmanship in a stacked dao set but at a wobble price! The negative hook angle makes flat-bottomed grooves and virtually splinter-free cuts. These sets includes 2 outside blades with 3 2-wing chippers. Every blade and chipper comes with Freud's kickback reducing design.
These sets are perfect for the weekend woodworker who wants an economically priced dado set without sacrificing quality. These resharpenable sets will produce grooves from 1/4" to 13/16" in 1/16" increments and includes shims for fine adjustments.
• Use on all table saws and radial arm saws for cutting slots grooves dadoes and rabbets in softwood and hardwood