A R C pre amps & amp considerations for Maggie 3.6

Hey there ! I have acquired a pair of 3.6 speakers and am leaning towards a A R C preamp. tubes preferably. the purchase would be a used one , with a budget under $4k. I have a old A R C D110 B AMP which I am toying with running the bass, or maybe not , point being amplification would more likely be solid state, unless I was to bi-amp (usexisting d110 ) and buy a tube amp for the top end . ah , but then what to do about crossover ? thanks in advance for your suggestions ! P S TO CLARIFY THE STATED BUDGET APPLIED TO PRE AMP ONLY.