IF YOU HAVE NOT ALREADY MADE A PURCHASE, I WOULD HIGHLY RECOMMEND THE HANGAR 9 ALPHA 60. IT COMES WITH A COMPUTER SIMULATOR AND THE .61 EVOLUTION NT ENGINE. I HAD A NEXSTAR, AND THERE IS NO COMPARISON IN PERFORMANCE. THE ALPHA WAS ALSO $50.00 CHEAPER AT MY LOCAL HOBBY SHOP. THE SIM WITH THE NEXSTAR IS BETTER, BUT THE AFS ADVERTISED ON THE NEXSTAR IS NEVER USED BY 90% OF THE PEOPLE WHO BUY THE PLANE. GOOD LUCK EUTHER WAY.