Hi Mick,
I'm not an imager myself, but I've read the stock standard replies to this same question many times. The experts would tell you that the eq5 probably won't cut it. The HEQ5 would be the minimum to aim for, and even then they would probably say to go for the eq6 - even if it means saving up a bit longer. The mount is the most important thing - no good having you beaut scopes and cameras etc if the mount wobbles at the first breeze.
Hope the experts don't contradict me here, but if they do, then please disregard what I've said and listen to them.
Cheers