I had the first riding session on my new 19.25" OG Kun Fu frame.
I'm also exactly 6' tall (with long legs and arms:)), and I rode the 18.75" prototype before. I can truly say that it was a damn good session. While I was riding I was like "why the hell did I ride shorter frames earlier"?
The 0.5" extra space gave me more control over the bike.
No matter which one you will take, hope you will like your frame as much as we do.
The new batch of frames arrived yesterday. I will do the webshop update next week, offering all the available versions (five colors, with or wothout brake mounts, two toptube lengths).
Attached a photo of my ride.