BMX Bicycling Is Fun

I miss riding my BMX bike.  It's been a while since I road and I really miss it.  It's nice being able to hit the park and shred with some headphones on and cool tunes bumping through 'em.  I need to get back on the bike and start riding again.  In order to do that, I'll need to build a new one first!  What type of frame should I buy?