I just recently changed from a 3 X 8 Shimano Acera to a Shimano Deore M6000 3 X 10 setup with a 11-42 cassette . Initaily I wanted to wanted to go to a 1 X 10 but after thoroughly thinking all I really wanted was rear derailleur with a clutch to stop the chain slap kinda wished I just got the derailleure. Shimano just released their M6100 lineup which is a 1 X 12 system thats compatible to the higher SLX and XT groupset it may be another option for you.