Check out the user reviews section at harmonycentral.com.

You'll probably find that most users give their synths 8 out of 10 or above (which I find slightly suspicious) BUT if there is a semi-serious flaw or indeed any weakness with the gear you have in mind then someone at the user reviews section is bound to speak out.

(I'm laughing here thinking back to the time when I almost bought an MS2000 but suddenly changed my mind after reading one or two VERY critical user reviews at harmonycentral.)