Trevor, there is a good thread on this scope here:
http://www.iceinspace.com.au/forum/s...d.php?t=117525
I ended up getting the SW120, and am more than happy. It is a superb wide-field scope for low power work, for objects like star clusters, nebula, galaxies (well, the relatively bright ones) etc. No good for planetary.
I don't use the AZ3 mount much, I instead put it on my AZ-EQ6. I also use high quality eyepieces with it, which brings the best out in it. But it is very sharp and the CA is not noticeable if used properly.