Very much agree with the recommendation for the Kona Unit and angleset. I picked up a 2018 Kona Unit X a couple years back and recently added a -1.5 works component headset which has been a great addition, especially to the 2018 model which has a 69 head tube angle.  67.5 works fine running it rigid for the local trails I can ride to, or if I want to I can put on my 120mm fork and slack it out a bit more.  Picking up a 2019 or 2020 Unit and giving it the same treatment is super tempting since its a degree slacker to start. I'm thinking of building up a new wheelset to replace the stock 27.5+ and the KOM i45s look like a good option.  I had a nice set of 29er wheels (I9 hubs, DT Swiss rims) built up over the summer, which are great for rides with the suspension fork but I like the 27.5x3 tires when I'm running rigid SS and going back to the stock 27.5 wheelset from the 29er setup is kind of painful.