Vision's new Metron bar is a bit of an oddball. It's their new top-end bar, but because it has integrated brake levers, it isn't fully Di2 compatible. This is likely because FSA is promoting its own Metron component group.
I absolutely LOVE Kurt Kinetic's top-knotch Rock And Roll trainer - this one (the Road Machine) features the same resistance unit, but at a lower price point without the fancy suspension.