Sorry, just my warped sense of humour regarding the suggestion of you paying for a trial in a Raven II.
Let's put this discussion into cars....
You want to learn to drive. You have two driving schools to choose from. One has a Ford Focus, one has a Ford GT40. You already know that you would loooooooove the GT40, but it's not going to make you a better driver, just a driver with less money.....
I'd personally pay for a 22.