R-M
Beware in a 500 of the sheer speed, the machine will be a good couple of seconds infront of you. R22 cruise 80kts, 500 up to 130kts so your mind has to be that bit sharper !
Where you will have a problem is long range navigation ( not taught in the conversion ) It is easier to get lost !!! due to performance. Think of it like this you have just learnt in a mini metro and have flown 100 hours, you are now getting into a high performance car. While they all drive the same that extra performance can get you into trouble twice as quick
Good luck