High quality cuts? Freud stack. Have to fuss a little with added or removing the chipper blade and the shims to get an 'exact' cut width. But you can get an exact width, especially important if fitting plywood (that is NEVER to its nominal size) into the dado/groove.
https://www.freudtools.com/products/SD208S
https://www.freudtools.com/products/SD508
Quick but not as clean cuts on the shoulder(s) and not necessarily a truly flat bottom would be a wobble blade. Some cut 'better' than others, but most (all?) do not do as clean of a cut as a 'good' stack dado blade.
If it matters to you or the cuts, double check even on a stack dado blade as some sets have the 'outside' cutters with rather aggressive 'scoring' teeth that WILL leave noticeable score/groove marks on the bottom of the cut.
For the best flat bottom dados/grooves without scoring marks, check for a 'box joint' blade set.
https://www.freudtools.com/products/SBOX8
Forrest blades are usually good to very-good, but usually seem to bit more expensive than even ' very good' Freud blades.