re: What's the best all around commercial grade selective broadleaf herbicide you've used?

Celsius. For my size lawn, it’s been no more expensive than off the shelf Lowe’s herbicides over time, and I blanket spray the entire lawn. I like it’s “slow kill” characteristics since healthy grass can more easily and naturally fill voids left when weeds are eliminated.

It also handles Virginia button weed well which is a SOB to get rid of.