Name a better stock sleeper than a V6 Citroen Xantia Activa.

good luck maintaining that, activas are so rare and complicated that almost no one is willing to work on them

also, best stock sleeper is a debadged lotus omega

buick regal gs

my Grandma got this exact model when it first came out, and still has it to this day, grandad has the XM and those two are, imo, some of the best french cars ever made.

Not sure if its high maintenance, grandads a mechanic so couldnt say