A similar question was posted on the accuquilt yahoo group recently, and this was my response:
Just my opinion...I'm on a limited budget and was saving for a Go! I saw a Go! Baby set on ebay this summer which I could not pass up. It included the Baby, 2.5" strip cutter for the Baby, Value die (which I swapped for a different die), the 6x24" cutting mat plus a 5x10 mat for $125 and free shipping! It works fine and was a great buy for me. However, if you can spend a bit more I would get the Go. It's bigger, heavier, and you have the option to use more (larger) dies. I bought mine for cutting small scraps and it's fine for that but I see other larger dies that look like fun.
Good luck with whatever you decide...These cutters are FUN!