I'm rebuilding my 160mm FS for the Alps (I pillaged it to build up a DH frame 2 yrs ago).
Most of the other guys I'm riding with are on Alpines; they've moved up to coil shocks but kept air forks. I think the RP23 is not sufficient for the Alpine in an Alpine environment. I'd at least want a Monarch plus/DHX or CCDB air. They also seem to be migrating to 1 x 10 / clutch mechs & ditching chain devices.
For my build I'm going with;
Mavic EN821s with hope hubs (replace EN823s)
1 x 10 NW
Zee FR clutch mech
Hope chain guard
replacement saint callipers
Lyrik U-turn coils (converted from 2 step air)
keeping the RP23 oversized air can
I'm trying to lighten it up as its going to get pedalled up as well as down.