As I've stated many times, I prefer to carry my phones sans-case (aka nekkid). However, If the time comes and my Tempered Glass Screen Protector does not protect my phone and the glass breaks, then I will cave in and put a case on it for additional protection upon receiving my one time free replacement from Verizon.
In preparation for this possibility, I've purchased the larger Seidio Clip holder which I had read would accommodate many of the thinner cases out there, and I've bought the Diztronic case as well as the Cimo to test. The Cimo was thin enough to fit into the holster and clip in with confidence. The Diztronic was not. It did "fit" into the case, but the clip was obviously under stress, and I would not be comfortable carrying the phone with that combination. I also felt that the Cimo was more comfortable in the hand than the Diztronic. Although the Diztronic is a very well made case, and not "thick" per se, it seemed to add just enough additional bulk to make it uncomfortable in my hand. Admittedly, I'm a small guy -- 5-5, 150 lbs, so the BN Turbo is already stretching the limits of what feels comfortable for me.
So, while I continue to carry sans-case with the smaller Seidio clip holster, I have a backup solution if I ever go that route using the large holster and Cimo (for now).