Thank you guys! Arturia Pianos are underrated for sure. People hardly talk about them.
The biggest player on the block for modelled pianos is Modartt Pianoteq, currently at V6. Both Bechstein and Steinway have recently officially endorsed Modartt's emulations of their pianos within Pianoteq V6, allowing Modartt to use their names. This is a quite a significant statement in the world of modelled pianos, effectively announcing their 'coming of age', because fans of sampled pianos have always scoffed at modelled pianos and accused them of sounding artificial and processed. If two legendary piano manufacturers are prepared to let their names be used on a software company's modeled emulations, those accusations aren't valid any more.
In my opinion, Modartt are ahead of Arturia in terms of realism, as recognized by the actions of Steinway and Bechstein. However Piano V2 has more controls and flexibility than Pianoteq and also has IMO a better interface.