Great write up on the WP suspension Evans!
From the first day I bought the 790 my intention was to build my own R and the best upgrade is suspension. I was debating on the WP versus the Ohlins and I decided on the Ohlins. I'm 45 minutes from Kyle Racing so it made sense to go with the Ohlins because of the superior customer service Mike provides at Kyle a Racing. I brought Mike the forks and he installed the cartridges for me and I did the rest. The Ohlins upgrade is the best mod I've done to the bike.
I've also added a Coober ECU, Akrapovič muffler, SBS brake pads, and recently a Matris steering Damper and Fly Screen. The Ohlins upgrade made a huge diffrence in the handling of the Duke. My buddy has a stock 790 Duke and when we switch bikes you immediately notice how much more composed and planted my bike is over the stock one. We ride some really tight bumpy roads in Northern California, and the Ohlins made a huge diffrence over stock, when the pavement is smooth the bike works phenomenal. Obviously I did some tuning with the clickers and preload to get a good all around feel for the variety of rodes we ride, however right of the box the Ohlins is great stuff.
I did ride the 790 at Laguna Seca in the A group for a few laps and it felt great, but a black flag shortened the session right when I was getting up to speed. I had my 2016 Yamaha R1 with me, and a track like Laguna likes horse power so I only rode the 790 that one session. I don't think you can go wrong with either the WP or Ohlins, I based my decision on the support I recieved from Kyle Racing and wanted to support my local shop, and of course I've always loved Ohlins stuff! I may need to add the PP wave rotors next based on Evans review!