Im operating both machine Vutek SC200/600 and QS3200. the 200/600 model is pretty slow compare to the QS3200. i print around 4x-5x (48x96), every hour in Heavy smoothing, you can print more if you go in medium or low smoothing. That machine is rarely broken.
The QS3200 is pretty fast (good for quantity production), the DPI is higher than the 200/600, its a 7 color (print white) compares to the 200/600 (6 colors only) but the major prob with that machine is the white, its pretty hard to adjust because if you dont print white color every day, its a little bit complicated to adjust. (purge white channel individually in the dos firmware)
And you have a pause option on the QS3200...