I think the whole per type of component thing is kind of silly. Sure in the perfect world this might come into play. In the real world many times you grab the component that becomes available to you. I agree that speakers are important, but certainly not by budget %. I have heard some very expensive speakers that I did not like, some I have liked but those really need a high level amp. My buddies high level MBL are amazing but are very hard to drive, for example....
I have always liked KEF speakers; however I could not afford the Blade 2,
, or the Reference. Therefore I got the next closes thing, the R series (KEF calls them the mini References, a direct trickle down from the Blades) which are almost a quarter the price of the Reference 3 because they build them in their Chinese factory; very close in performance (a friend owns the Reference 3 which I have compared). So I could get a KEF that I enjoy with retail about $3800.
Digital is very important to me and from a lot of research and definitely confirmed in my listening, I believe that DACs that do not use off the shelf chips (ESS, BurrBrown, AKM, etc.) perform better. Also DSD was very important to me. I could not afford MSB, Lampi, dCS, etc., so I was considering the PS Audio DirectStream. However I found the T+A instead. Granted they use BurrBrown for PCM but they make their own 1-bit processors for DSD, which is all that matters since I am running HQPlayer.
Therefore my DAC retails for more than the speakers but works beautifully in the system.
Same with my amps. The Audio Mirrors are normally $5000 plus I got about a grand in tubes I roll through them. The T+A retails just a tad under the speakers. Therefore the amplifiers retail for more.
My computer/music server, W4S Recovery, and software cost more then the speakers.
The power conditioner and cables are priced quite a bit higher also.
So the speakers are about 1/6 the price of the system but match very nicely and are certainly not being outclassed by the rest of the system!
If I were using the percentage that I see discussed here and elsewhere I would have gotten something like the Blade 2's and then have to use something like Schitt, NuPrime, Benchmark, W4S standard models. All good but none that I would never consider using them with Blade 2's. I believe my configuration is better.