I have an Accuquilt Studio. I had both the Go and the baby and switched to the Studio, because I preferred the flexibility of the larger format, even though it has to have a dedicated space. I can use all the Accuquilt dies, including the Go and Baby size. I have also bought some of the Sizzix dies (you just need an adapter) and they work well.
I would recommend Ebony Love's book,"Fabric Die Cutting Tips." She writes about the different machines and their pluses and minuses. She also has a website, just search for her on the internet.
I have used my tumbler die (actually a go baby die) to make a border on a quilt and several of the strip dies for doing binding and sashing. I love those for when I need to cut large numbers of pieces.