we've had several threads recently about cutters--think the big thing you need to figure out first is what you are wanting a cutter to do--if it's cutting applique, then a Scan N Cut or Silhouette will do a good job and allow you to either download or design your own shapes, plus you can use with other mediums, and there are no dies involved, which keeps it cheaper in long run. If you are wanting a cutter that will allow you to cut out a whole quilt with accuracy and speed (and ease if you have back,shoulder, hand issues), then a die cutter like Accuquilt or Sissix (sp?) is your best bet as you can cut 6-8 layers, do it quickly and accurately, and use dies for more than one block. You can also buy dies for applique.
Once you've figured what you really intend to do with it, then you can compare the different makes. I personally wanted something for applique and other medium, but find that I use my Accuquilt Go Big much more than my Silhouette (at least with fabric!)