Which rotovator.

We have a need for a Rotovator as we have a large area of ground we want to cultivate, i have been looking on good old ebay to find such an item and i dont know what to do, i need a driven one as i dont want to be hanging on for grim death all day.
There are some realy nice old Howard rotovators that would be good but then again for the same price i can buy one of these imported jobs and have it delivered.
Does anyone know what these imported things are like, are they any good or am i better off getting an old Howard?
My Dad has got an old merry tiller but i cant hang on to the dam thing, and with the garden being all grass at the moment the thought of having to churn through all that and hang on does not appeal.