EQ5 can be upgraded from manual slowmos to dual axis drives pretty easily , and to goto if that's what you want.
The dual axis controller can be enhanced to include a rj12 interface so you can connect an autoguider too (see Shoestring's instructions).
I am not sure about what upgrades are available for the SV1.
Quality wise : EQ5 vs SV1 , probably much the same.
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