To Chi-Fi or Not

Hi y'all, I live in New Zealand and have perfect pair of Plinius M16 (designer modded) pre & SA100mk3 amp driving ProAc Response 2.5s. Sound is wonderful. Problem is I sat in front of Dynaudio C1s through a Moon Integrated and went rapt. So I'm going to go up the addict's trail. Combined with this is a desire to prepare soon to size room downward. So I was wondering. Opinions sought: Can a Chi-Fi (Yaquin or other low cost tube integrated)rated at 85W into 8 ohms drive the C1s which are 86db sensitive, same as the ProAcs, but 4 ohm load? The Plinius has much more power and Class A on fly switching. But will a smaller amp, current unclear, drive the lower 4 ohm Dynaudio C1s? I'm a jazzer not a banger. Listening 4 differences & presence not torrents in sound.
Thank you for your input. Alejandro