another what amp?

Current
Accuphase preamp mid seventies rebuilt very clean sound
Adcom 545ii
Rega RP1 w/ Ortofon Blue
Rega Apollo R / Rega DAC on order
Vandersteen 2ce's bi wired
Vandersteen 2W sub

Listen to Jazz 50% of time, Blues 30%, Classic Rock rest of time.

What would another amp give me in this scenario. Budget up to 1200 for right amp.

Unfortunately I cant go anywhere and audition amps. The dealer near me (2 hours) only stocks tubes then I am 5 hours to next high end shop.