Like Roelof has said, the Nova N21-7T is like a Nova Kangaroo. We import both into the USA. The N21-7T sells for about $310 and the Kangaroo for about $350. The Kangaroo is by far the more popular engine of the two. For the extra $40 you get a great engine that you can compete with at any track. The Kangaroo is the best value in the Nova line. Go with a Kangaroo, you will not regret it.
If you are on a budget you should consider the Nova N21-5T. It sells for less than $240 and is a great engine. You'll save over $100 and it is still a strong performer.
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