New Lee Grad Filters (Medium Vs. Hard)

[sunnyVan]

Currently I have one 3 stop soft grad. What should my next investment be? Last time I checked Lee's website there's only soft and hard grad filters. But there are now medium and very hard grads too. I pretty much ruled out very hard grad already as it seems too limiting. I'm thinking of choosing between 3-stop medium and 3-stop hard. I want to hear from experienced users.