alexgate,
Please understand I'm not being an ass when I say this - if you are looking to purchase new I think you should wait until you have more money. You are literally risking your life. Fixed gear bikes are exceedingly simple machines. This is a good thing. But, just like anything stripped down to the bare essentials, all components must be of reasonable quality. You will not meet that requirement on your current budget with a new bike. Used is a different story. A man can get all kinds of lucky by scouring flea markets (be careful about stolen bicycles), yard sales, Good Will (seriously), etc.. Given the time of year I think you will come up golden within 3-4 weeks.