sansui or yamaha

Keep the Sansui. I was never a big fan of Yamaha. Very thin sounding.

Ih8this1, That's a blast from the past for me!

I owned DCM Time Windows and Sansui gear back in 1976. I still have my TU-717!

I tend to agree with Yogiboy. if my memory serves me, the Sansui/DCM combo had a somewhat colored sound, and I thought that may have been a characteristic of the Windows. Have you tried other amps with your speakers?

I'm afraid that I disagree with both Yogiboy & Kennythekey. I have a vintage Yamaha CA-2010 that I think lives up to its name of "Natural Sound Amplifier". I do not find that its sound is thin at all. In fact, I need to plug one of the bass ports of my speakers to contain the bass.
Sansui vintage amplifiers are beautiful to look at - fine workmanship of the past - but they are well-known to have much richness in the mid-bass. This fact is well documented. If you like this type of sound, great for you!
I personally prefer the well-balanced sonics of the Yamaha amp. YMMV.

The AS2000 is a neutral amp. Definitely not thin sounding.