I used to own the SF Grand Pianos. My personal experience:
Worst SS integrated with the GP's: Sim Audio I-5 (dry,dark and lifeless, huge bass but artificial one-note thump, and not just with the Grand Pianos by the way)This integrated is the proverbial steal - for the manufacturer that is.
Best SS integrated: Electrocompaniet EC-3 (liquid smooth, beautifull, but watch the ones with the faulty volume controls - there may be some out there still) Also very nice: Arcam A-85, more alive and much faster than the electro, has a crystal-clear sound, more detailed but not,''tubey-sounding'' like the electro. Arcam's a different school, but I absolutely loved the flexibility.
Worst tube integrated: Conrad Johnson CAV-50 (way too buttery)
Best tube integrated: Cayin 88-T , amazing for the price.
Hybrids: No experience on the Sonus speakers.