Vans Warped Tour Tickets?

On the VWT website, it says that I can pre-order starting April 1st. I heard you can get them for about $20. I searched up other sites and it seems like I can buy them NOW from tickettango.com and prices range from $58-$243 depending on which section you want to be at. I live in NC by the way so i will be going to the warped tour in Charlotte. If any of you have been to warped tour and purchased tickets online, should I buy my ticket from the official VWT site or get it from somewhere else?? and if I do end up getting it from the warped tour site for under $50, does that mean i wont be close to the stage at all?? Because I want to be close to it as possible.