My On One 45650b with 26inch wheels and 150mm forks.
I've only had two spins and it works, works a treat actually! The 26inch wheels on the frame haven't tried to kill me, ha!
16 inch frame is great on the downhill and climbs too. I am six feet tall but like smaller flickable frames.
My decision to go this way was I had decent 26inch parts and I could upgrade at a later date when needed, future proof.
Done blue and black trails in Kalamunda and Margaret river here in WA and for a bike that I've only ridden twice it was egging me on to go harder.