I have the Nova as I bought mine about 3 years ago. From my experience, any NFusion is a good receiver. Good quality picture and good "up" time. As far as I know, nothing gets N3 as it hasn't been hacked in North America yet. NFusion, like some others are just card sharing. Better up time but not a true N3 hack. Occasionaly their are 'work arounds' which is simply a subscribed card in the server which we all get to enjoy. I'm looking at an HD unit next when N3 gets free as I already have several SD receivers from ROM cards to true fta's.
Reguardless, beware of clones and buy from a rep dealer. beware of some on flea bay. Ya never can tell...