[Q] Thinking of purchasing an M8.... topic

I am thinking of getting a Verizon M8, but I have a few questions. I am coming from a Galaxy S4. It's rooted, and I love the phone. When I got it, I did some research, but not enough to realize that only the phones with the MDK firmware could be truly rooted. I use Safestrap, and I am limited to a select few, but good, ROMs. Does the M8 have any of these issues. I noticed some of the threads mention "sunshine", and avoiding updates, but I haven't had time yet to dig my claws into it. What should I look for when I am looking?