Cary Audio slp-03 vs BAT vk-30 vs Modwright ls36.5? With Parasound A21.Which is the best?


Need help with my not easy preamp choice to make - Cary Audio slp-03 vs BAT vk-30 vs Modwright ls36.5 ? It will be used with  Parasound A21 amp through XLR connection (Input impedance: 66k Ω ) From technical point of view, which one the best to complete the combo ?
surfmuz