Powerful Integrated Amp for Inefficient Speakers

I've got a nice pair of Linn Sara 9 Isobariks, but they don't seem to be getting enough power from my YBA Integre integrated amp with Cardas Power Cord. The only associated equipment are an original Rega Planet and MIT Terminator 2 bi-wire, which I'm happy with.

This is a second system and I don't plan to use anything other than the Rega CDP. Does anyone have any recommendations for a "musical" integrated amp with some muscle to run my Saras?