cerimartin1 :
Why is that ? Loads of people have done this with good results.
I delidded my (NON-K) 8700 with a delid deb8er 2, artic cleaner 60ml kit (rushed honestly didnt wait longer than 5 min to apply) and applied grizzly conductonaut after it spat a 3 piece sundae on my tissue. I applied a pinhead drop and carefully spread a really thin layer with the black swab supplied from the conductonaut. and left it back on loose the IHS allowing the MB Clamp to hold it in place.
Setup - Cryorig C7 + Noctua L9i Fan - case demands 45mm limit - I literally meet it - as the cooler C7 with stock fan is 46mm and the stock's fins are sticking up (unlike noctua's) giving it clearance issues
It is risky - a lot can go wrong - but it went well on my first go because I took precautions with liquid metal.
I had to do it because - I was getting on a 8700 with RPCS3 The Last of Us - mid 90c - now its getting 78c instead when running for 10 minutes (but im guessing its because it didnt hit 4.3GHz).
I'm still going to mod my Skyreach 4 Mini to fit a Scythe BS2 Rev.b heatsink as that would be 46mm tall and the fan stock (12mm) is 58mm in total - would look cool and would cool well though.
https://pcpartpicker.com/user/HYPERTiZ/saved/Lcyr7P
I will try to add pictures - but it will be a 3 week wait til im back home...
In the meantime here is the delid temps of the 8700 running on the above delidded. As you are getting a 8700k - I will assume it would potentially be similar as turbo is effectively the same.
https://imgur.com/gallery/wIlaLvs
For you unless you really need the space to save or cant fit in your circumstances a better cooler than it really depends. its up to you if you're willing to risk the delid and lose of warranty.
I actually want to try it with a 8700k now out of curiosity.
BUT unless you are extremely confident in your abilities to be careful (as in liquid metal applying and taking necessary precautions as you need to - and you understand the risks involved - then I cant decide for you - its up to you to decide.