Well... I would probably recommend VIP. i have had both nx and vip. (vip still has 3 weeks to go xD.) Nx was good, but u need to buy a fair bit to get a couple of good things. VIP is great fun, but it can get boring when u just speedhack them and shoot em through walls xD But then u just play "legit" (with no recoil, reload and spread and speedhacks and chams) and then go back and ur good. xD
definityly vip nx is cool but, OMG I HAVE A MERC, now wat you look cool and get a vest. ya you can buy i minigun but with hacks you can get the same effect from a default pistol lol. vip all the way and like mouzie said it will get u bettr playing legit (i hope).