The Rotel has 2x60W and would be driving 8ohm nominal impedance at a sensitivity of 87 dB 1w 1m. Personally I think that will be absolutely fine. They're an average sensitivity in general, fairly good for a small monitor. With the Rotel you should get a surprising amount of bass punch and rhythm too. The amount of absolute volume you get won't be concert levels but I imagine they're going to be in a small room anyway. The room size and distance you sit from them will be key in determining the ultimate volume capability available from the matching.