Help/advice, upgrading my vintage amplifier!

Hi there!

I'm still new on this stereo world so I'm looking some advice!
My current set up is;

Turntable; Schiit Sol.
Cartridge; Sumiko Moonstone.
Phono Preamp; Schiit Many.
Amplifier; Sansui G6000 (recapped).
Speakers; Klipsch Lascala (Bob Crites upgraded).

I love how everything sounds but I was thinking, am I going to get more out of my speakers is If I use a newer amplifier? (I have a vintage amplifier) and a different phone preamp? I was thinking in the Cambridge duo Alva preamp and the Cambridge axr100 amplifier? If someone out there want to share your experience I will appreciate it! I don't want to spend a considered amount of money and get the same results or maybe slightly better.

Thank you in advance!