Sound quality impact - preamp vs power amp?

This is getting old both are very important.HELLO!!

Everything matters

Omg Isn’t it simple? We all know this — Start at the speaker and work upstream to the source. So logically the proper matching amp would be next. 

Thats why all my stuff is from the same manufacturer

If you match a top level preamp with a lower level amp, you will reveal all the weak points of the amp. If you match a top level amp with a lower level preamp, you will never hear the top performance of your amp. 
So I agree they are equally important because the whole point of high end audio is trying to eliminate the weakest link.