It's time for me to replace the drivetrain on the canyon. I'm currently 3x10 22/30/40 SLX Crank and 11-36 Shimano Cassette. So if I'm reading things right I could buy a new narrow wide chainring and a sunrace cassette and have a pretty good range of gears on 1x10?
That is an option I looked at: keeping my 10spd and I would get the same ratio as going 11spd 11-42 cassette - the change between gears just slightly larger and perhaps slightly less smooth than 11spd. Should all be compatible for you... I'm no expert but 'chainline' might be a consideration to fine tune setup with spacers - I haven't done anything with mine and seems fine so far, but might look into further.
But I went for 11spd as needed a new derailleur anyway so got: xt 11-42 cassette, med derailleur + shifter, chain, raceface n/w 32 ring and all came in around €250 and it is sweeeeet! It's so quiet going downhill and no chain drops, woooohoooo!
After a trial run with Stephen's old ring on my 10spd setup, I struggled a bit on the climbs but was pretty confident that going up to 42 in the back and 32 on the front would be a good combo for me. I did find however that the chain dropped numerous times on spins, prob down to wear on all parts.