For me the only reviews that matter are Road Racing World. When they dyno test bikes they do it right, as well as any other testing. I've been involved with them in the past from a manufacturers standpoint, and while you may want to argue about the outcome, it's hard to argue with their testing and validity of the testing/riders. I'd keep an eye out for when they get their hands on one and see what they say.
Most of the liter bikes have reached a point where HP really is pretty irrelevant unless you are drag racing. As long as you are in the hunt, it's more about the electronics, feel of the bike, suspension, etc. How the bike handles the power is more important. The BMW has been king of the hill for a few years but I don't see a ton of them in the the mountains where I ride. Track, somewhat but they are $$ to work on and fix if you toss it down the track. Buddy has a well set up one that the dealer still can't fix and figure out why it stumbles every so often on the track (leading to crashing).
most of the guys I ride with on the street now have mostly moved to naked bikes. I have a 1290 Super Duke, buddy has the aprilia Tuono, another a Hypermotard, 890 Duke, etc. We can ride all day, or multi day trips if we want, and plenty of performance for our riding (SE US). A good day of riding for us could be 400+ miles, most of it on twisty roads.