Tbh dude its all about your personal preference
What you need to do is try out your current setup and decide what its doing and if its actually doing anything you dont like.
A few peeps in the uk have fitted an rb25 and decided they have more understeer. They removed the front bar to gain more grip up front. The anti rollbar is a tuning device and you can get varied results from changing between s body and r body, stock and aftermarket bars.
If you have understeer you may want less front or more rear bar and vice versa. Obviously there is more too it than just bars