Oussebon
Multiverse Poster
I would say it's worth going for the Kaby Lake build yes. The modest performance bump and the extra features for £25 more would be easily enough for me to justify the extra cost.If you are certain that this is the config now as opposed to the earlier Skylake config, then I will trust your judgement in this as you obviously know about this stuff in depth.
From what I've seen that motherboard has had some very positive early reviews and on a personal level I'm quite taken with it. Those new features are nice. Not earthshattering, but nice.
Obviously you can tweak the build how you want it - more SSD / less HDD etc / expedited build/ etc. But as a core spec my opinion is that the above is a very valid choice and should do well for what you want it for.