If you are in the US, I recommend the CycleOps Magnus/M2 or Wahoo Snap.
If you are in the EU, I might recommend the Tacx Vortex. I say that with the caveat that it has a couple of known faults that are relatively common. They are notoriously generous with power data when compared to most power meters. They also have a common defect where the metal wrap on the roller flexes away from the plastic base, which creates lots of additional noise. It can be fixed via superglue as shown on several YouTube videos.