I was interested in the RP briefly, so watched a bunch of videos on it, some of them were very pro RP - saying it was incredible value, ignore the nay sayers etc - but almost all of the reviewers showed it wasn't the greatest for a FF sensor for high ISO. With some showing it Vs APSC sensors like Fuji and Sony E and it didn't fare too well beyond 3200. This wouldn't be the turn off for me as such, just something to be wary of - along with, as you say, the poor DR. Combined, at higher ISO, when you need to give that extra little push in post, images can fall apart quickly. I'd still consider one though at current prices, if only it had IBIS :/ I do hope they put out some kind of follow up budget friendly R that includes the feature. Rumors suggest they will some time soon