Well, I don't know what will fit as far as holsters, but I can highly recommend the 36. I love mine and it will be my primary carry gun once my permit process is done. For me it is easier to conceal than the 30 and is also lighter. Going off the measurements it does not seem like much difference, but handle the 30 and 36 back to back and you can feel a big difference. At least I could. The 36 being a single stack just fit my smaller hands a lot better. I would imagine that the 36 would fit your currnet holsters, especially if they have tension screws.