Upgrade to a new heli. Most of the current 30 size helis will be a great improvement over your nexus. I have a Hawk Sport and a Caliber 30. Both are much better than the Nexus. It's not fair to even compare them. The venture and raptor are also very good. Any of the four I have mentioned will serve you well. The Hawk sport is probably the least expensive and the Caliber the most expensive. Both in initial cost and crash repair costs. I would get whichever you can get parts for the easiest.
basmntdweller