I swear by my Geo with the ST kit, its really really good and im not just saying that for sponsorship reasons. It was good before but wow what an improvment.
Plus its a whole bag of cash cheaper than the NT. You could get a new Geo, GST kit, preset, Rotor and a shaft kit and still have some change out of the price of an NT!!!
Only fired the NT once and its nice but I would still rather have my Geo anyday.
Just my opinion but to be happy you need to try them side by side.