IMO they looked over the sweetest of all - the 2600x.
With all the fuss about ipc vs threads, then the 2600x is the best balance.
Yes it has inter ccx latency, but only 2 of it's 6 cores are affected, as opposed to 4 on amd 8 cores.
The x option just seems so cool. It has taken til this revision of zen to bring out the power of ~1000 sensors spread around zen, and using them to use to dynamically squeeze the best from your cpu in your ecosystem.
It makes Zen blossom, and only zen+, X models have the full kit to do it - xfr2 & PB2.