The best solid state sound I have ever listened to used the Constellation Audio Hercules II monoblocks / Altair II. I can imagine it would be a great match for ribbons ...
The Constellations sounded good on Magico Q3s. Also heard them on Neoliths.
Have heard the Altairs only in Munich. Not my choice. The only rockport I have relatively liked is the Grand Mira II, which is a very different design. Tall, slim, like a line source, but a Dapollito, MTM design, with front and side firing woofers. No rear-firers. It's quicker and more immersive than the others. Think a bit light on bass, but nothing that can't be fixed by a sub.