I use the Dirty Harry Dia Compe lever with a Shimano 105 dual pivot caliper and have had no issues, plenty of stopping power alone, and very good when combined with adding resistance to the pedals (not skidding, I like my tyres!).
Beware that only one colour comes in a size that will fit drop handlebars. I bought the wrong one by accident but managed to get away with filing down the clamp to fit over the bars.
I use the Dirty Harry Dia Compe lever with a Shimano 105 dual pivot caliper and have had no issues, plenty of stopping power alone, and very good when combined with adding resistance to the pedals (not skidding, I like my tyres!).
Beware that only one colour comes in a size that will fit drop handlebars. I bought the wrong one by accident but managed to get away with filing down the clamp to fit over the bars.