Having pondered this dilemma myself for weeks, I took the plunge and went for what I originally had fancied, a Genesis Tarn 20. Steel, BOOST compatible so 27.5+ or 29er dropper, 1x SLX setup – good spec. I’ve only ridden it for 1hr so cannot reply comment but they got great reviews and owners rave about them.
There’s deals out there on the 2017 model but I picked mine up “nearly new” from Grizedale Mountain Biles, they had another used one, I think in Large, for £900. You could do as I’ve done and get yourself a set of 29ers to go with it and have two bikes in one 😉