What might be the liighest weight and best quality options that are currently available to replace this bottom bracket and the crank (Shimano SM-BB51 bottom bracket + Deore FC-M591 3x9 crankset) which was original on the bike in 2012? The bike uses 135mm QR dropouts and has hydraulic disc brakes.

3x9 replacement would be most direct but am not opposed to going to 1x10, 1x11 or 2x if it’s straightforward enough.