Currently having the same dilemma as the OP.
Got a couple of European trips coming up so want to replace the Monarch on my Scout with something with a piggyback. Probably an air shock.
I went down the coil route last year (Banshee Prime), since sold the bike, never used the coil apart from abroad. The weight difference was too significant, and the lack of climb switch was also an issue.
So my options given the size requirement appear to be:
DB Air CS £575
Fox Van with a tune £unknown as not clear what’s included. Likely £400-£450 I guess
Pushed Float X £599
Anyone have any thoughts/experiences? Favouring DB Air at the moment.