What series are you racing? I heard this new version is coming as an early 2016 model around April/May so most seasons will be well underway by then.
For a racing bike, I think the R1 will have much more parts and support in the USA. Plus the Graves team is doing development so they will have the knowledge base to pass on to customers, as well as necessary parts like flat-rate shock linkages, triple clamps as well as Ohlins valve stacks to get the most out of the new R1.
Finding that support in the USA for a 2016 RSV4 RF? Good luck with that...