Roll bar AND a rear strut tower bar?
 

I was thinking of getting a 8-point roll bar kit for my car and was wondering if the roll bar provides enough rigidity by itself or should I also get a rear strut tower bar (namely the Cusco triangle bar)? Thanks.

The roll bar will provide a good amount of rigidity without the strut tower bar. I would suggest skipping the strut tower bar IF you need the space for tires, tools etc. If you don't need the space, and have the extra money, then go ahead and add the brace. It certainly won't hurt.

Well, I guess depending on how much space I'll have left, I'll decide if I should get it or not (I'll probably end up getting it anyways). Thanks for the advice.