Just another option you could look at if you know anyone who has the kit.
I've got a Silhouette Portrait plotter bought a year or so ago, and use it for various decals as well as Evergreen Plasticard cutting and scoring (yes I flat pack 3d models from Blender into 'paper fold' style plots too).
The plotter has an 'eye' as well as the cut knife (which is a pivot-and-drag style affair). I've used CorelDraw for photo layers and vector drawing additions then flatten all those to high pixel bitmaps. I also ensure I have 'empty' (no fill no line colour) shapes for my cut lines, and then export all as PDFs ready for the Silhouette software. I print from the Silhouette software too as it has registration markings available for the plotter's eye, and print to inkjet white or clear waterslide sheets, using genuine Epson ink cartirdges (this can really make or break depending on the quality you're after). I let the ink dry off (give it say 30mins to be sure), and then with Krylon Matte Finish I spray the decal sheet (so make sure you get everything you need on the sheet else a lot of wasted space). I give it 2 or 3 coats of the Krylon, and leave that overnight (again could leave it shorter but I usually do this as a last job before lights out).
By the morning the sheet should look quite flat matte looking, and then I mount the sheet to the carrier sheet for the plotter. Fire up the software again but only go into cut mode. I then cut the decals out and I cut slow so I can get pretty decent detail. Circles never looked so good
Done this a few times too (into other stuff too and made a 2U guitar effects box unit the same way using Krylon and Silhouette combo which turned out great!)
So if you know anyone who has a Cricut or Silhuoette rob them for a few hours so you can get high grade decal cuts really well.
Just what I do here, I'll get some images up later of what sort of thing it can do