Pete,
I got the email from AP that a Mach 2 could be mine. I am not sure what to do, currently I have an EQ6R, EQ8R and a G11. They all fit on my C120 pier and seem to cover all size scopes I could possibly want. I have 2 weeks to decide.
I also had an EQ6 (no R -- older version) and an EQ8 (again, no R -- original version) and upgraded to the AP Mach-2 GTO-L. I found it to be a very significant upgrade. Even though the EQ8 could handle my scopes, there was always some issue that just wasn't "quite right". The largest issue was Declination backlash which changed with ambient temperature. I could adjust it out for most seasons when I imaged with the mount the most but if the ambient was over about 95° F, then the declination axis would occasionally bind up during a slew.
There have been no such issues with the AP Mach-2. It works perfectly under all conditions. The APCC-Pro software that is bundled with the Mach-2 adds many features that make using the mount so much easier and pleasurable.
Haven't really used any of it yet for any serious AP.
Now, here is the issue. If you will remain visual only, the Mach-2 may not mean much to you. It is a fine mount but for visual use only, I can understand your quandary. It would have been a hard decision but if I only did visual astronomy, I would probably have passed on the Mach-2 (or never put my name on the list in the first place). The only feature that the Mach-2 and APCC might give you for visual use is if you use the mount for visually following satellites across the sky.
John