I am looking to get a cutting machine also and the research that I have found is that the silhouette cutter looks more functional, the cricut is limited to just their cartridges but the s i l h o u e t t e connects to your computer so you can actually create and dowload custom designs. It is more expensive but will pay for itself in the long term.
I also thought it was cheating in the beginning, but the bottom line is the most beautiful cake for your client. Technology allows us to expand our creativity and improve the overall outcome of our products. Go back 100 years and ask those bakers what they think about "The Mat", microwaves, hand held mixers or a kitchenaid!