I got the NEQ6 and was in the same boat. Tried a friends zoom lens (Cannot remember exactly what it was now). Got fairly decent results. Found we had to tape the ring to stop it from slipping (Maybe just his lens). Was getting 3-4 mins unguided at about 400mm, over that and 4 mins was pushing it (Slight oval stars). I have used my Prime Lens (400) which I have got some pretty good results with (For me). I have held off buying an ED80 for 2 reasons, lens gets me good results at the moment when I am still learning and money! As I think you have already decided, give it a go and then go onto a scope later down the line.