matching with klipsch palladium p38f

what kind of amplification you think should be the ideal match for palladium P38 F and source accuphase dp500 cd player? i am between unison research integrated S9 and on the other side, audio research pre SP17 with VS115 amp.what i am about to loose with unison and what with audio research?? i ve read excellent reviews for both . thank u in advance..