We just got the FLX2010 (with Cognex bottom vision) from essemtec. got it running in a few days. really easy to use.
i had a look at the autotronik and TWS. the TWS didn't look very good to me (not very sturdy construction, but it is cheap.
i can't say much about the autotronik.
the FLX2010 was the most expensive, but we got the whole line from essemtec (reflow printer and p&p). great service from the supplier (contax in belgium).