Buy a budget complete bike. You'll get more bang for you buck. I don't ride freestyle so I don't know as much about it but I know there are lots of options:

http://www.statebicycle.com/category_s/33.htm

http://purefixcycles.com/collections/fgfs-bikes

I recently built up a "budget" fixed/track bike and it ended up around $900 by the time I was done. All new parts but a lot of the parts were "budget" like $100 wheelset, $20 bars, $30 saddle etc