Gavin,
I have an EM400. Nice mount precision made but some issues that you might want to consider.
- There is no home position on the mount, meaning it cannot be used as a remote mount.
- There is the issue of having to hold down the s2 key to get it to track for the southern hemisphere. It also means it cannot be used in a remote system.
- It does not come with a saddle plate, you need to buy one separately. Nor do the mounts come with a tripod, you need to buy this separately too.
- However, these mounts do produce fantastic images, when combined with the right guiding. Each part of the mount is silky smooth and a real joy to use. Polar alignment is fantastic when the knobs move like skates on ice.
- The mounts need a decent hand controller to be made by Tak. Most high end mounts now have good hand controllers with one exception being the PME (I could be wrong but that is what I am told).
Best of luck with your decision.