I absolutely love my Tallboy V4, but I think you would have to put on some pretty high end parts to get the weight near where you want it for a light trail/downcountry bike.
I built mine from a 2020 CC frame, 140mm Pike fork, Spank aluminum bar/stem, SLX 4 piston brakes, 180mm rotors, XT cranks, derailer, shifter, Box 11sp cassette, X fusion dropper, and Nox composite/I9 hydra wheelset, and 2.6 tires. Total weight 29.8 lbs.
I run the bike in the high setting with the short chainstay chips for one really awesome trail bike for our East TN trails. I built mine up from the frame before Covid really hit. I chose this route because I too felt like you just didn’t get good value for money with the Santa Cruz complete builds.
Good luck in your search. The Ripley sure does look like a sweet ride, and should tick off all of the boxes on your wishlist.