I've had my 6850k stable at 4.2ghz and I'm not finding it too slow, but I've also got a pair of servers I offload anything I can to, so that has definitely had

I've had my 6850k stable at 4.2ghz and I'm not finding it too slow, but I've also got a pair of servers I offload anything I can to, so that has definitely had an impact on my perception of how fast it is. But I'd say it's far from being too slow. The boot times and load times for most software is fine for my use cases. It was just too expensive of a build to justify an upgrade so soon.