"most comfortable" and "racing seat" is something that rarely goes together. It will definitely depend on body type and use. We've put alot of miles on the Status Ring and Status Spa respectively, and of course the reclinable wins on long trips every time. The best solution is to review a manufacturers measuring specs to find the best solution for you.
Bride:
PRODUCTS-?????BRIDE?
Spec example:
http://www.bride-jp.com/images/produ...size-zeta3.jpg
Sparco:
Sparco USA
See the
SEAT DIMENSIONS CHART
Status:
Status Ring FIA - Status Racing