Take a look at ihaveanotion.com, I think there is a review on there about the different machines. I have the Studio and the dies are really pricey but with an adapter I can use Go dies and Sizzix dies. The Sizzix machines are a bit less pricey and the biggest Sizzix machine uses all but the biggest Studio dies. My suggestion would be to take a look at which dies you want before deciding on the machine.
Suzy