I have a small shop in a small town, but I try to keep up with all the latest technology. I rented a Wizard to get my feet wet, and I really like it. I also liked the idea that they would fix it if something broke. Technical support has been very good. The only issues I have had (besides a learning curve1) was an occassional slight hook on the corners, which tech support was able to tweek with one call.
Apparently, some of the issues (besides price!)are: 1) how much mat is wasted if you let the machine cut the outside? Wizard wastes 1.5", the Fletcher & Eclipse is less. 2) How tightly can the head rotate? This makes a difference when it comes to design work, clip art, etc. 3)Noise. The wizard makes lots of noise when cutting ovals,clip art, etc. 4) Can the machine cut 8-ply mats? I don't think the Wizard is supposed to be used for this, I don't know about the others.
I'm sure there are lots of other things, too. For me, the Wizard is affordable, and suits the needs of my small shop, but for heavy production you might think of the Flethcher.