Thanks for the advice everyone, yea the field flattener is something that I'm planning to buy too. I also put the Ed100 and ED120 into stellarium as occulars and notice very little difference. But as noted below it's the bigger aperture that I particularly like as it will get the fainter stars.
I emailed Andrews optics this evening and will follow up with a call tomorrow. The advertise as having ED120 in stock but Ozscopes also had the same advertisement only to email me saying they didn't.
Anyway thanks for the advice.
Tom
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