MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
You can directly import them in Sketchup and rework. I just tryed with the Standard version and it's imported correctly, no error and manifold object. Providing you an SKP is exactly what I would do to you...
Regarding your interrogation on which material would fit the job better, I'm not sure ABS would work correctly since it's a softer plastic than PLA (tendency to bend rather than break). But prove me wrong, I'll be glad to have your test result.