I tried out the Sutra LTD (1x11) and liked it and it's ability for wider tires. Sutra steel frame is also my reccomendation over Al Trek. I prefer 1x drivetrains too.
have you considered the Kona Rove? Similar to Sutra LTD but built for 650b. I got my wife this and she loves the stock 650b x47 WTB Ventures.