Almost your entire post is subjective. Real world game benchmarks mean nothing to a Video Editor. An AMD FX is a monster at video editing, but you'd never know by looking at most game benchmarks. Gaming benchmarks are totally useless for a work PC.All "synthetic benchmarks" are questionable. They only give you an idea of what could be reality. Real world games and applications are what matter. Some of these synthetic benchmarks test very specific features, but in the real world, there are lots of other things happening at the same time.
You don't build a PC for synthetic benchmarks. At least most people don't. You build them for specific applications, gaming and what ever you actually do with your PC. Unless you compete in OC contests, synthetic benchmarks mean very little.