About rhinoceros i can say one after going to maya... this program is completely not for making games!!! When i think about how long it took me to make a track in rhino and how i made it, and i see how it can be done in maya... my hands are dropping on ground with my jaw XD
Maybe it's easier to learn, but it's AutoCAD for making architectural models, so i think that you better stay with blenderMore possibilities
(and you won't make a moving water in rhino as i saw that it's two same textures with bump mapping enebled moving in opposite directions... in rhino you can't make texture move
)