I'd either get a Pake or a Mercier Kilo TT.
For your first track bike, I wouldn't spend $600 on a frame. Get something cheaper like either of these and spend the extra money on better components.
The Pake's get a lot of hate because they are a bit heavier. But on the streets, I doubt you will feel the difference.
If you're riding on the velodrome, different story. I've never ridden one.