Well someone has to take the contrary view. For raw fun on a once off basis, I don't think you can beat the Schweizer. It's a super stable trainer and so you can get all the flying out of your system first, probably even to a passable hover.
But if you find someone who can really fly it, you can then have a real blast in the last half hour. I've done things (under supervision !) that I wouldn't have believed possible in a light heli, including a tailslide auto in a tight turn, an approach and landing without touching the collective from the cruise setting, seemingly vertical torque turns. Just huge !
I've only got about an hour in the 47 and whilst it's a lovely and historic machine, I think you'll have more fun in the 300.