I have a couple of their cases as well. Very nice stuff. But, I end up purchasing whichever case will actually fit the best (nice and snug) for travel, hiking, etc. None of the case mfrs have updated their lens lists in forever, so if one plugs in 4" by 6" on the Lowepro site, a case will pop up that is similar to a small casket in size. Way too big. I'm still betting the Pearstone will fit, but probably won't order it until I get back in June.
What's the ETA for your lens? We need some pictures in this thread!