The 13900 reviews are coming out - it's a bit of a beast! Damn thing runs hot as hell though, although that's hardly surprising with 300W boost (or maybe 350W?). That's not going to make the green agenda people very happy! AiO with a 360 radiator is possibly minimum cooling if you plan to regularly use the potential of this CPU (like with rendering). Probably will scream on LN2, going to be interesting for sure.
I may just stick with the 12900K for now though.