Your speakers are more than capable of delineating the differences between amps..and your other upstream gear. If you pair them with a marginal amp/preamp, or a marginal sounding integrated, they will sound like what your upstream gear is allowing them to sound. IOW, garbage in…garbage out.
This has been my experience as well. I believe that those excellent speakers are easily capable of exploitation the quality of amplifier driving them. But that's me. The OP has explained his rationale and I respect that. To each their own with regard to audio decisions.
Charles