Basically, the new Percy will have a .1 after it. There is a long winded explanation for it all somewhere on oople. It's all techno crap really.
I say stick with the RC3 for now and see what happens. It will run all the current PT's and as such not put off any budget racer.
SHRCCC is a club racers venue and holding a few big scale events won't matter to the overall scheme of things, in my opinion. It will take a while till everyone gets the newer PT's so leave as is for a while.
That's my opinion.