Many thanks for all of your comments, all noted and not wasted.
I think I will go for the guens heng gs680 mainly for the fact it does not use the rack and pinion focus. Apart from that I seem to think they are very similar.
The only problem with my decision is that no one in Perth sells this and I need to waste money on freight and I have heard that Andrews Comm are rather heavy on freight.
Thanks again
James Kirk
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