Made this ratio today, starting with 60ml of Koloa white rum. It really is a wonderful ratio for the daiquiri. I think I got a good dilution since it's rather warm here so the ice melted well during the vigorous shake, plus I did a quick simple syrup which was warm and helped melt the ice more.

I only see the Koloa coconut rum listed on this site, but they do have white, golden, spiced and dark rum options. Though, so far my favorite white rum is a Florida based one called Florapina. Not reviewed here, but it's inexpensive for those based in the USA that can find it and for the price point it is magnificent.