I'll sum it up as quick as I can:
1. A 1060 (non OC) + a 65w CPU works fine with the 160XT KIT in my tests and several customer builds but you are pushing the upper limit of the brick.
2. If you get a OC 1060, it still might be totally fine, as I have built a couple of these for tradeshow booths, but you are really pushing it, so depending on your particular brick or components, you might want/have to do some tuning.
3. If you don't want to think about it, do any tuning, or have lots of overhead, go with the HDPLEX and a 19v Dell brick. Because this is the most safe option, it is the one I have on my website.
No matter your choice, the Pico 160XT is capable of much more power, but it is the power brick that is the cap here, but I think the Pico 160XT's days are numbered as there are 19v "pico-style" solutions coming out, and 19v bricks are more capable (at lower costs).