I was in your position recently, OP. With the small rifle primer pocketed Lapua offering, the decision is a no-brainer. You have the advantages of the x47 Lapua, with the option of running factory ammo if need or want be.
I haven't yet ran into a comp shooter who has said they would be staying with the x47 Lapua when it's time to re-barrel. I know they've got to be out there, but I simply couldn't justify going with the Lapua.
I'm running a 28" heavy palma Bartlein. I haven't yet loaded my own ammo, but I am going to be shooting for pushing my 139 Scenars at 2950. If I get a node at 2900, I'd be good with that.