My neighbor has the new one circuit maker which comes with a special wheel cutter, just like a rotary blade and it does a fabulous job of cutting any kind of fabric. The fabric does not need to have any backing.
I am looking into getting one and will probably get the cricut maker . I did look into the scan n cut and all of their videos. I was not thrilled that fabric did not cut very well since I would use it primarily for fabric. If you do your own designing you can now do it off line.
Keep us posted with your decision.
Look at tube you will see a lot of good info on the cricut maker.