The Golden era of Japanese integrated amps, are we missing out?

I’m relatively new to vintage audio gear, but from my experience nothing “ modern” that I have owned, can hold a candle to the sound quality, aesthetics and build of these timeless pieces. I will add that after much reading and research I decided to skip the chase and purchase rebuilt gear from quality techs. To date I have a Marantz 2270 and 2250B. I also own a pair of rebuilt OL Advents to play with the 2250B, and use the 2270 with my Klipsch Cornwall’s. Music to my ears every day.... Now looking for a nice vintage power amp. 

uberwaltz - Several have told me that those speakers do amazing with cap upgrades. Even with relatively inexpensive caps like Mundorf MKP or Clarity CSA.

I think it's a very inflated story. I just recapped my ~35 years Heco speakers to a disappointingly minute difference. I mean, 9 out of 10 people will not notice the difference. Only a very very slight change in transparency and twitter level and I think the highs sound harsher now. 
The original caps were bypolar smooth type and I recapped with Jantzen Cross-caps (MKP).

I'm not saying it doesn't work, but the speakers need to be very revealing and the caps probably need to be of higher (more expensive) class. It's not night and day on old equipment.

Sansui AU-717 and TU-710 tuner used everyday day. Recently serviced and recapped. Sounds as good as my Marantz KI-PM Pearl integrated. 

I loved my Kenwood integrated amp. For 37 years it was my only amp. Beautiful natural, balanced sound. 

Put me in the "anti" camp.  I sold all the Japanese brands in their '60's heyday .... the US designed Haron-Kardon's beat them hands down.  The Audionics BP2 preamp and CC amplifier beat all of them hands down.  And these were in the same price range.  Not to mention the Eico kits, Healthkits, and Fisher and Scott kits of that same era.

The most expensive I evaluated in my home was the complete top end Luxman line .... preamp, power amp, tuner.  They were good, looked fabulously expensive (and were), and sounded somewhere between Marantz transistor gear and the Audio Research SP-6 and D70-90-115 line which cost no more.

I've heard lots of Japanese electronics which sound very good for the price.  But I've never heard any that sounded remotely close to the best.