Not sure what your requirements are as far as price, and performance.
If you looking to do just club or weekend track days.. I would recommend as a low cost option the corbeau clubman.. usually around 350 or so..
http://www.corbeau.com/products/clubman/clubman.shtml
They are not the perfect seat, but they do secure you quite well, and the price is a positive.
Negatives on it, are the material will wear over time, the plastic pieces that hold the fabric where the belts go thru on the top of the seat may come loose, and if you can afford some extra padding for the lubar section, I would recommend it. I found them lacking a little in lubard support.
If your not looking for bling, they may be your ticket.
VR
Alex