Cheap and tinny....I think you are very subjective.

I had several keyboards through the years:
Yamaha psr630,640,730,740,2000,9000,9000pro, Solton sd1, technics kn6000, kn6500.
And now I ordered a technics kn7000 and this one is super.
The sound is very very good...sounds as played by live players.
I am a brass player as well (I play the slide trombone and tuba). Most keyboards do not come close to these sounds but technics does.

I don't say Genesys is no good...it is very good.
You won't hear me say Genesys is tinny and cheap...not at all.

We all have our personal opinion and that's good , other wise we will all want the same wife,the same car , the same clothes....

Alain