This is a really neat tool, thanks for sharing it. I've been into 3D printing as a hobby for a while now and have gone through a handful of printers. Searching the models I'm familiar with, I'm pretty floored by how much the prices have dipped (even in the last year) and how feature-loaded new printers are. I haven't really been in the market for a new printer for a while, but this app is changing my mind. :)

The only suggestion I have, and I don't know how readily available this data is or how hard it would be to generate, but a visual representation of the print quality for each printer would be great. I've always found the advertised resolution of a printer to be a really sub-standard way of determining print quality before I buy. For me, printing something uniform [0] and comparing it to the same thing from another printer (using the same slicer) is the best demonstration.

[0] Been using this one for a bit: http://www.thingiverse.com/thing:5683