The only one of those I've used is an EQ8 and I wouldn't recommend it to you . It's not bad per se, but it's not in the same league as the other mounts you've listed. Consider it a "big EQ6." Basically I think the EQ8 is a good choice if you're happy for that chinese build quality and need to support a bigger payload than the EQ6 will support, but don't want to spend much, or any more than the EQ8 costs.
If you need to support a big payload, the Mesu 200 might be worth a look. An interesting friction drive mount that could support "a motorbike with a sidecar" as I saw someone recently say.
I've given up on my EQ6 and will be ordering an Avalon Linear some time in the near future. I'd love a 10 Micron or an Astrophysics, but alas the budget won't stretch quite that far.
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