It really depends if you need a mount that can find it's position after loosing power? Eg Automated or autonomous. If the latter then the cheapest mount you are probably looking at a mount like an MYT. The new AP Mach2GTO with absolute encoders ought to be amazing. The 10Micron mounts are also reputedly very good. But, none of these are cheap!
If you can handle a bit of a process to park in the right spot, and perhaps keep the mount powered up then an EQ6 is a good choice.
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